EP0673495B1 - Inlet for feeding raw materials into a rotary drum - Google Patents

Inlet for feeding raw materials into a rotary drum Download PDF

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Publication number
EP0673495B1
EP0673495B1 EP94930159A EP94930159A EP0673495B1 EP 0673495 B1 EP0673495 B1 EP 0673495B1 EP 94930159 A EP94930159 A EP 94930159A EP 94930159 A EP94930159 A EP 94930159A EP 0673495 B1 EP0673495 B1 EP 0673495B1
Authority
EP
European Patent Office
Prior art keywords
collar
rotary drum
chute
inlet
projection
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 - Lifetime
Application number
EP94930159A
Other languages
German (de)
French (fr)
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EP0673495A1 (en
Inventor
Hans-Dietmar Dr.Rer.Nat. Maury
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Individual
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Individual
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Filing date
Publication date
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Publication of EP0673495A1 publication Critical patent/EP0673495A1/en
Application granted granted Critical
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Classifications

    • 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
    • F27B7/24—Seals between rotary and stationary parts
    • 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
    • F27B7/32—Arrangement of devices for charging
    • F27B7/3205—Charging

Description

Die Erfindung betrifft einen Drehtrommeleinlauf zum Zuführen von Rohmaterial in eine Drehtrommel, insbesondere in einen Drehrohrofen zur Herstellung von Zementklinker, mit einer zur Einlaßöffnung der Drehtrommel führenden Rutsche, die aus einem Metallmantel und einer inneren Auskleidung aus feuerfestem Material besteht, wobei der vorderste Teil der Rutsche durch einen bis in die Drehtrommel ragenden, lösbar an der Rutsche angeordneten Kragen gebildet wird, der hohl und zur Drehtrommel hin geschlossen gestaltet ist.The invention relates to a rotary drum inlet for feeding raw material into a Rotary drum, especially in a rotary kiln for the production of cement clinker, with a slide leading to the inlet opening of the rotating drum, which consist of a metal jacket and an inner lining made of refractory Material is made, the foremost part of the slide through one to the Rotating drum protruding collar detachably arranged on the slide is designed to be hollow and closed towards the rotating drum.

Drehofeneinläufe mit Guteinlaufrutschen sind beispielsweise aus der US-A-35 47 417 bekannt. Die bei solchen Anlagen verwendeten Rutschen unterliegen einer sehr hohen abrasiven und thermischen Beanspruchung, welche mit einer fortschreitenden Abtragung der feuerfesten Auskleidung insbesondere im Bereich des Austragendes der Rutsche verbunden ist.Rotary kiln inlets with material inlet chutes are, for example, from US-A-35 47 417 known. The slides used in such systems are subject to a very high abrasive and thermal stress, which with a progressive removal of the refractory lining, particularly in the area the discharge end of the slide is connected.

Zur Vermeidung der damit verbundenen Nachteile ist es aus der DE-32 45 702 C2 bekannt, am Ende der Rutsche zur Abstützung der feuerfesten Auskleidung einen der Drehtrommel zugewandten, doppelwandigen und aus einzelnen Stützsegmenten zusammengesetzten Kragen anzuordnen. Der Kragen ist durch einzelne Stege in Kammern unterteilt, die zur Außenseite der Rutsche hin offen sind und durch Einführung eines Kühlmediums von außen gekühlt werden können.To avoid the associated disadvantages, it is from DE-32 45 702 C2 known at the end of the slide to support the refractory lining one facing the rotary drum, double-walled and made of individual Arrange support segments composite collar. The collar is divided into compartments by individual webs leading to the outside of the slide are open and cooled from the outside by the introduction of a cooling medium can be.

Aber auch dieser Einlauf unterliegt hohen abrasiven Kräften, so daß während der Betriebsdauer häufig Wartungsarbeiten erforderlich sind. But this enema is also subject to high abrasive forces, so that during maintenance work is often required during the operating period.

Der Erfindung liegt die Aufgabe zugrunde, den bekannten Einlauf zum Zuführen von Rohmaterial in eine Drehtrommel so weiterzuentwickeln, daß sich während der Betriebsdauer größere Reparaturintervalle erreichen lassen, und sich eine erhöhte Wartungsfreundlichkeit ergibt.The invention has for its object to further develop the known inlet for feeding raw material into a rotary drum so that can be achieved during the operating period greater repair intervals, and results in an increased maintenance.

Zur Lösung dieser Aufgabe werden die in Anspruch 1 aufgeführten Merkmale vorgeschlagen.To achieve this object, the features listed in claim 1 are proposed.

Ein solcher Einlauf weist einen deutlich verminderten Verschleiß im Bereich des Kragens auf, so daß es im Vergleich zu bekannten Konstruktionen weniger häufig erforderlich ist, Reparatur- oder Wartungsarbeiten im Bereich des Drehtrommeleinlaufs vorzunehmen. Außerdem ist es besonders einfach, den Kragen zu befestigen bzw. wieder zu lösen. Da dieser einfach an der Rutsche eingehängt wird, ist es zum Austausch des Kragens nicht erforderlich, die feuerfeste Auskleidung der Rutsche zu entfernen, so daß sich insgesamt eine reparatur- und wartungsfreundliche Konstruktion ergibt.Such an inlet has a significantly reduced wear in the area of the collar so that it is less compared to known constructions Repairs or maintenance work is often required in the area Rotary inlet. In addition, it is particularly easy Attach the collar or loosen it again. Because this just on the slide it is not necessary to replace the collar, the remove fire-resistant lining of the slide, so that there is a total repair and maintenance-friendly construction results.

Die abhängigen Ansprüche 2-4 beinhalten besondere Ausführungserben der Erfindung.The dependent claims 2-4 contain special execution heirs of the Invention.

Weitere Einzelheiten und Vorteile des Gegenstandes der Erfindung ergeben sich aus der nachfolgenden Beschreibung der zugehörigen Zeichnungen. Darin zeigen:

Fig. 1
ein Anlagenschema einer Anlage zur Herstellung von Zementklinker;
Fig. 2
einen Ausschnitt der Fig. 1 im Bereich des Einlaufs zu einem Drehrohrofen und
Fig. 3
Einzelheiten eines im Bereich des Einlaufs angeordneten Kragens.
Further details and advantages of the subject matter of the invention result from the following description of the associated drawings. In it show:
Fig. 1
a plant diagram of a plant for the production of cement clinker;
Fig. 2
a section of Fig. 1 in the area of the inlet to a rotary kiln and
Fig. 3
Details of a collar arranged in the area of the inlet.

In Fig. 1 ist eine Anlage zur Herstellung von Zementklinker dargestellt. Diese besteht aus einem Drehrohrofen, in dem der Zementklinker gebrannt wird, einem Vorwärmsystem 2, welches bei dem Ausführungsbeispiel als vierstufige Zyklon-Wärmetauscheranlage ausgebildet ist, sowie einer dem Drehrohrofen 1 nachgeschalteten Kühleinrichtung 3. In Fig. 1 a plant for the production of cement clinker is shown. This consists of a rotary kiln in which the cement clinker is burned, a preheating system 2, which in the embodiment as a four-stage Cyclone heat exchanger system is formed, and one of the rotary kiln 1 downstream cooling device 3.

Das Rohmaterial tritt an der mit dem Bezugszeichen 4 versehenen Stelle in das Vorwärmsystem 2 ein, durchläuft nacheinander die einzelnen Stufen, um über ein Ofeneinlaufgehäuse 5 anschließend in den Drehrohrofen 1 zu gelangen. Das Vorwärmsystem 2 ist mit einer Feuerung versehen, so daß das in den Drehrohrofen 1 eingeführte Rohmaterial nicht nur vorgewärmt, sondern bereits teilweise kalziniert ist. Das im Drehrohrofen 1 vollständig kalzinierte und gesinterte Rohmaterial verläßt diesen durch dessen Auslauf 6 und wird nach Durchlaufen der Kühleinrichtung 3 in Richtung des Pfeiles 7 einer weiteren Verarbeitung unterzogen, z.B. einem Mahlen des Klinkers. Zugleich strömt Luft in Richtung des Pfeiles 8 durch die Kühleinrichtung 3, den Drehrohrofen 1 und das Vorwärmsystem 2 im Gegenstrom zu den zu behandelnden Rohmaterialien und wird schließlich unter Mitwirkung eines Gebläses abgeführt.The raw material enters at the point provided with the reference number 4 Preheating system 2 one, passes through the individual stages in order to over an oven inlet housing 5 then get into the rotary kiln 1. The preheating system 2 is provided with a furnace, so that in the Rotary kiln 1 imported raw material not only preheated, but already is partially calcined. The one completely calcined and sintered in the rotary kiln 1 Raw material leaves this through its outlet 6 and is after Pass through the cooling device 3 in the direction of arrow 7 of another Subjected to processing, e.g. grinding the clinker. At the same time, air flows in the direction of arrow 8 through the cooling device 3, the rotary kiln 1 and the preheating system 2 in countercurrent to the raw materials to be treated and is finally removed with the help of a blower.

Das das Vorwärmsystem 2 verlassende und in das Ofeneinlaufgehäuse 5 gelangende Rohmaterial hat insbesondere dann, wenn im Bereich des Vorwärmsystems 2 eine teilweise Kalzinierung stattfindet, beachtliche Temperaturen, so daß eine in Fig. 2 dargestellte Auskleidung 9 aus feuerfestem Material, die Teil einer Rutsche 10 des Ofeneinlaufgehäuses 5 ist, einer hohen thermischen und mechanischen und insbesondere abrasiven Beanspruchung ausgesetzt ist.The one leaving the preheating system 2 and entering the furnace inlet housing 5 Raw material has particularly when in the area of the preheating system 2 partial calcination takes place, considerable temperatures, so that a lining 9 shown in Fig. 2 made of refractory material, which is part of a chute 10 of the furnace inlet housing 5, a high thermal exposed to mechanical and in particular abrasive stress is.

Die Rutsche 10 wird durch einen Metallmantel 11 gebildet, der das Profil einer Kegelfläche aufweist. Auf der Innenseite des Metallmantels 11 ist die feuerfeste Auskleidung 9 verankert.The slide 10 is formed by a metal shell 11, which is the profile of a Has conical surface. On the inside of the metal jacket 11 is the refractory Lining 9 anchored.

Dichtungen 12, 12' stellen eine gasdichte Verbindung zwischen dem rotierenden Drehrohrofen 1 und dem stationären Ofeneinlaufgehäuse 5 her.Seals 12, 12 'provide a gas-tight connection between the rotating Rotary tube furnace 1 and the stationary furnace inlet housing 5 ago.

Den unteren, ofenseitigen Abschluß des Metallmantels 11 und damit der Rutsche 10 bildet ein einwärts und in etwa horizontal gerichteter, doppelwandig hohl geformter Kragen 13. Dieser Kragen 13 hält die Auskleidung 9 in diesem Bereich fest und wird in nachfolgend noch näher zu beschreibender Art und Weise an der Rutsche 10 bzw. deren Metallmantel 11 befestigt.The lower, furnace-side closure of the metal jacket 11 and thus the slide 10 forms an inwardly and approximately horizontally directed, double-walled hollow-shaped collar 13. This collar 13 holds the lining 9 in this Area is fixed and will be described in more detail below and Attached to the slide 10 or its metal jacket 11.

Da der Kragen 13 hohl ausgebildet ist, läßt sich über nicht dargestellte Leitungen Kühlluft in das Innere des Kragens 13 einführen. Diese Kühlluft kühlt die Innenwand des Kragens 13 und trägt damit dort zur Minderung der ansonsten sehr hohen Temperaturen bei.Since the collar 13 is hollow, can be via lines, not shown Introduce cooling air into the inside of the collar 13. This cooling air cools the Inner wall of the collar 13 and thus helps to reduce the otherwise very high temperatures.

Einzelheiten des Kragens sind in Fig. 3 dargestellt. Dieser ist als doppelwandige Konstruktion aufgebaut, wobei der so gebildete, mit Kühllufteinlässen versehene Hohlraum zum Drehrohrofen 1 hin geschlossen, und in entgegengesetzter Richtung, d.h. an der Rückseite des Kragens 13, zur Einführung der Kühlluft offen ist. An der Rückseite des Kragens 13 ist dieser mit einem sich senkrecht zur Längsachse des Kragens 13 erstreckenden Vorsprung 14 versehen, mittels dessen sich der Kragen 13 an dem Metallmantel 11 der Rutsche 10 einhängen läßt. Der Vorsprung 14 ist als rückwärtige Abwinkelung der oberen Wand 15 des Kragens 13 ausgebildet. Die untere Wand 16 des Kragens 13 ist, dem Vorsprung 14 gegenüberliegend, mit einer schräg nach oben gerichteten Abwinkelung 17 versehen. Diese liegt bei in die Rutsche 10 eingehängtem Kragen 13 an einer Stützfläche 18 des Einlaufgehäuses 5 an. Durch diese Anordnung des Vorsprungs 14 sowie der Abwinkelung 17 ist sichergestellt, daß sich der Kragen 13 abnehmen und wieder einhängen läßt, ohne daß zuvor die Auskleidung 9 der Rutsche 10 entfernt werden muß.Details of the collar are shown in Fig. 3. This is double-walled Structure built, the so formed, with cooling air inlets provided cavity to the rotary kiln 1 closed, and in the opposite Direction, i.e. at the back of the collar 13, to introduce the Cooling air is open. At the back of the collar 13, this is with one projection 14 extending perpendicular to the longitudinal axis of the collar 13, by means of which the collar 13 on the metal jacket 11 of the slide 10 can hang. The projection 14 is the rear bend upper wall 15 of the collar 13 formed. The bottom wall 16 of the collar 13 is opposite the projection 14 with an obliquely upward directed bend 17 provided. This is attached to the slide 10 Collar 13 on a support surface 18 of the inlet housing 5. This arrangement of the projection 14 and the bend 17 ensures that the collar 13 can be removed and reattached, without first having to remove the lining 9 of the slide 10.

Fig. 3 läßt erkennen, daß der Kragen 13 an seiner dem Drehrohrofen 1 zugewandten Vorderseite mit einer Verkleidung 19 versehen ist. Die Verkleidung 19 bildet einen hitzefesten Abrasionsschutz und besteht zu diesem Zweck aus einem geeigneten keramischen Material, welches vorzugsweise mit der entsprechenden Wand des Kragens 13 verschraubt wird. Um einen bestmöglichen Abrasionsschutz zu erreichen, sind alle verschleißanfälligen Flächen des Kragens 13 mit der Verkleidung 19 versehen. Da abrasive Einflüsse auch im Bereich der unteren Wand 16 des Kragens 13 auftreten, erstreckt sich ein Teil 20 der Verkleidung auch dort. Fig. 3 shows that the collar 13 on its facing the rotary kiln 1 Front is provided with a panel 19. The costume 19 forms a heat-resistant abrasion protection and consists of for this purpose a suitable ceramic material, which preferably with the corresponding Wall of the collar 13 is screwed. The best possible To achieve abrasion protection, all wear-sensitive surfaces of the Collar 13 provided with the panel 19. Because abrasive influences also in Area of the lower wall 16 of the collar 13 occur, a part extends 20 of the fairing there too.

BezugszeichenlisteReference list

11
Drehrohrofen, DrehtrommelRotary kiln, rotary drum
22nd
VorwärmsystemPreheating system
33rd
KühleinrichtungCooling device
44th
Pfeilarrow
55
OfeneinlaufgehäuseOven inlet casing
66
AuslaufSpout
77
Pfeilarrow
88th
Pfeilarrow
99
Auskleidunglining
1010th
Rutscheslide
1111
MetallmantelMetal jacket
1212th
Dichtungpoetry
12'12 '
Dichtungpoetry
1313
Kragencollar
1414
Vorsprunghead Start
1515
obere Wand des Kragenstop wall of the collar
1616
untere Wand des Kragensbottom wall of the collar
1717th
AbwinkelungBend
1818th
StützflächeSupport surface
1919th
VerkleidungCladding
2020th
Teil der VerkleidungPart of the cladding

Claims (4)

  1. Rotary-drum inlet, in particular for feeding raw materials into a rotary kiln for producing cement clinker, having a chute (10) which leads to an inlet opening of the rotary drum (1) and which consists of a metal jacket (11) and an inner lining (9) made of fireproof material, the end of the chute (10) that opens into the rotary drum being formed by a collar (13) which projects into the rotary drum (1), is removably arranged on the chute (10), is hollow and is closed towards the rotary drum (1), characterized in that, on the surfaces facing the rotary drum (1), the collar (13) is clad with a heat-proof abrasion protector (19, 20) made of ceramic material and, on its side facing away from the rotary drum, is provided with a projection (14), and in that the metal jacket (11) of the chute (10) has an opening (14a) which accommodates the projection (14) in order to hook the collar (13) onto the chute (10).
  2. Inlet according to Claim 1, characterized in that the projection (14) extends at right angles to the longitudinal axis of the collar (13).
  3. Inlet according to Claim 1, characterized in that the collar (13) has an upper wall (15) which is provided with an angled section that forms the projection (14).
  4. Inlet according to Claim 1, characterized in that the collar (13) has a lower wall (16) which is provided with an angled section (17) which is directed obliquely upwards, lies opposite the projection (14) and, when the collar (13) is hooked into the chute (10), rests on a stationary supporting surface (18).
EP94930159A 1993-10-09 1994-10-10 Inlet for feeding raw materials into a rotary drum Expired - Lifetime EP0673495B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4334521A DE4334521A1 (en) 1993-10-09 1993-10-09 Inlet for feeding raw material into a rotating drum
DE4334521 1993-10-09
PCT/EP1994/003332 WO1995010745A1 (en) 1993-10-09 1994-10-10 Inlet for feeding raw materials into a rotary drum

Publications (2)

Publication Number Publication Date
EP0673495A1 EP0673495A1 (en) 1995-09-27
EP0673495B1 true EP0673495B1 (en) 1998-09-23

Family

ID=6499820

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94930159A Expired - Lifetime EP0673495B1 (en) 1993-10-09 1994-10-10 Inlet for feeding raw materials into a rotary drum

Country Status (8)

Country Link
US (1) US5730590A (en)
EP (1) EP0673495B1 (en)
JP (1) JP3055070B2 (en)
CZ (1) CZ282981B6 (en)
DE (1) DE4334521A1 (en)
ES (1) ES2123160T3 (en)
PL (1) PL178742B1 (en)
WO (1) WO1995010745A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2889735B1 (en) * 2005-08-09 2007-09-28 Pa Technologies Sa COMPOSITE BAR FOR USE IN A CEMENT OVEN

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE66492C (en) * E. winkler in Alzenau, Bez. Liegnitz Harmonica with flute work
US2266396A (en) * 1941-05-31 1941-12-16 Allis Chalmers Mfg Co Rotary kiln
FR1195119A (en) * 1957-04-27 1959-11-16 Steinmueller Gmbh L & C Process for sealing a space formed by two or a greater number of containers movable relative to one another and whose relative movement is not carried out exclusively in a horizontal plane and device for its implementation
US3436061A (en) * 1967-05-25 1969-04-01 Little Inc A Rotating sectioned furnace
US3547417A (en) * 1968-05-23 1970-12-15 Smidth & Co As F L Rotary kiln assembly
SU589523A1 (en) * 1975-11-20 1978-01-25 Всесоюзный Научно-Исследовательский Институт Цементного Машиностроения Rotary furnace
DE2940727A1 (en) * 1979-10-08 1981-04-16 Plibrico Co GmbH, 4000 Düsseldorf Inlet plate for rotary cement furnace - consists of segments with hollow protruding ceramic blocks with cooling tubes locked inside
DE3245702A1 (en) * 1982-12-10 1984-07-05 Klöckner-Humboldt-Deutz AG, 5000 Köln INLET FOR TURN DRUM
FR2634545B2 (en) * 1987-07-17 1991-03-29 Fives Cail Babcock DEVICE FOR PROTECTING THE MOUTH OF A ROTARY OVEN
JPH039208A (en) * 1989-06-06 1991-01-17 Mitsubishi Electric Corp Detecting device for steering angle of vehicle rear wheel
DE4300827A1 (en) * 1993-01-14 1994-07-21 Krupp Polysius Ag Rotary kiln inlet

Also Published As

Publication number Publication date
US5730590A (en) 1998-03-24
PL309340A1 (en) 1995-10-02
CZ282981B6 (en) 1997-12-17
JPH08501872A (en) 1996-02-27
ES2123160T3 (en) 1999-01-01
CZ150195A3 (en) 1996-01-17
DE4334521A1 (en) 1995-04-13
WO1995010745A1 (en) 1995-04-20
JP3055070B2 (en) 2000-06-19
EP0673495A1 (en) 1995-09-27
PL178742B1 (en) 2000-06-30

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