EP2795217B1 - Vorrichtung zur kühlung der öffnung eines drehrohrofens mittels kühlluftblasung - Google Patents

Vorrichtung zur kühlung der öffnung eines drehrohrofens mittels kühlluftblasung Download PDF

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Publication number
EP2795217B1
EP2795217B1 EP11815761.9A EP11815761A EP2795217B1 EP 2795217 B1 EP2795217 B1 EP 2795217B1 EP 11815761 A EP11815761 A EP 11815761A EP 2795217 B1 EP2795217 B1 EP 2795217B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
kiln
air
distribution chamber
channel
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.)
Not-in-force
Application number
EP11815761.9A
Other languages
English (en)
French (fr)
Other versions
EP2795217A1 (de
Inventor
Sébastien DEVROE
Damien FONTAINE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fives FCB SA
Original Assignee
Fives FCB SA
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Filing date
Publication date
Application filed by Fives FCB SA filed Critical Fives FCB SA
Priority to PL11815761T priority Critical patent/PL2795217T3/pl
Publication of EP2795217A1 publication Critical patent/EP2795217A1/de
Application granted granted Critical
Publication of EP2795217B1 publication Critical patent/EP2795217B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status 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
    • F27B7/38—Arrangements of cooling devices
    • F27B7/383—Cooling devices for the charge
    • 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
    • F27B7/383—Cooling devices for the charge
    • F27B7/386—Rotary-drum cooler
    • 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
    • F27B7/40—Planetary coolers

Definitions

  • the invention relates to a device for cooling a mouth of a rotary tubular furnace by blowing fresh air.
  • the field of the invention is that of rotary tubular furnaces, in particular furnaces used in the calcination of mineral materials, such as for example in the manufacture of cement clinker.
  • a rotary tubular furnace essentially consists of a metal cylinder, usually called ferrule, whose inner wall is protected by a refractory material such as brick or concrete. Materials are introduced into the cylinder of the furnace inside which they are intended to be fired. During cooking, the oven cylinder is rotated on its axis.
  • each end of the metal cylinder enters a fixed box in which hot gases circulate, thus ensuring the continuity of the treatment circuit between the rotary kiln and the fixed parts of the installation of which the furnace is part.
  • the outlet end of hot materials conventionally comprises a burner and is often the hottest part of the oven cylinder. At this end, the furnace cylinder is thus subjected to high thermal stresses and it is necessary to cool to ensure its protection.
  • This end of the metal cylinder is further protected by a protective device which comprises one or more end pieces, metal, fixed to the end of the cylinder, covered with a refractory lining.
  • Cooling is generally done by blowing fresh air, and it is known to channel air along the wall of the furnace cylinder by constructing several envelopes around the cylinder. ( FR-2443654 and FR-2494827 ).
  • these fans blow in front of one of the annular channels, directly or via a distribution line. Only a part of the air enters the canal, the rest escaping into the ambient atmosphere. Cooling is uncertain unless there is a high excess of ventilation capacity.
  • a rotary joint has a fixed ring surrounding the cylinder, provided with a sliding system on the surface of the cylinder and ensures the airtightness between the fans and one of the annular channels. .
  • the air losses are avoided, but the sealing system is subject to heavy wear, requiring regular maintenance.
  • the object of the present invention is to overcome the aforementioned drawbacks by proposing a device for cooling a mouth of a rotary tubular furnace by fresh air blowing, easy maintenance and improved cooling performance.
  • Another object of the present invention is to provide an increased safety cooling device in the case of a fan stop.
  • the invention relates to a device 100 for cooling a mouth of a rotary tubular furnace 1 by blowing fresh air.
  • the furnace comprises a metal cylinder 3 coated internally with a refractory material 73, which cylinder 3 is rotatably mounted relative to the furnace frame.
  • Materials, especially mineral, are intended to be introduced into the cylinder 3 and are intended to be cooked inside the cylinder 3.
  • It may especially be a rotary kiln of a facility for the calcination of mineral materials, for example used for the production of cement clinker.
  • each end of the metal cylinder 3 enters a fixed box in which hot gases circulate, thus ensuring the continuity of the treatment circuit between the rotary kiln and the fixed parts of the installation of which the furnace is part.
  • the outlet end of hot materials conventionally comprises a burner and is often the hottest part of the oven cylinder. At this end, the furnace cylinder is thus subjected to high thermal stresses and it is necessary to cool to ensure its protection.
  • This end enters a fixed box 2, usually called heating cover.
  • a sealing device 20 closes the circuit of the installation between the fixed box 2 and the mobile cylinder 3 of the rotary tubular furnace, in particular cooperating with an outer casing 6 which will be described later.
  • This end of the metal cylinder is moreover protected by a protective device which comprises one or more end pieces 4 of the cylinder, metal, fixed to the end of the cylinder, covered with a refractory material 74, such as brick or concrete.
  • the end piece or parts 4 are disposed inside the fixed box 2.
  • this end piece 4 may actually consist of several metal parts distributed around the periphery of the cylinder 3, and fixed at one end of said cylinder.
  • the end piece 4, metal may have an outer wall 41, in particular concave, facilitating the lining and attachment of the refractory material 74, a flange 43 extending outwardly of the cylinder 3 of the furnace, and a flange 42 extending towards the axis of the cylinder 3, in particular covering the edge of the refractory material 73 disposed on the inner wall of the cylinder 3.
  • the air flow is effected in said first channel 50 to the end piece 4, then in the opposite direction in said second channel 60, before exhausting air through an exhaust opening of said second channel 60.
  • the air is thus blown from the outside of the stationary box 2 into the first channel 50.
  • the air licks the cylinder 3, then licks the end piece 4, in particular the wing 43 cooling the cylinder 3 and said end piece 4.
  • the air flows in the opposite direction in the second channel 60 from the inside of the fixed box 2, towards the outside where it escapes through an opening of exhaust of the second channel 60.
  • the inner envelope 5 is arranged at a distance from the end piece 4 so as to create an annular passage 51 between the first channel 50 and the second channel 60.
  • This passage 51 is defined between the piece of end 4, the inner casing 5 and the outer casing 6.
  • the outer casing 6 is in airtight contact with the flange 43 of the end piece 4.
  • the fan or fans 9 of the ventilation means are integral with the cylinder 3 of the rotary kiln, for supplying the first channel 50 with compressed air, avoiding or even severely limiting the air losses, and without the use of a rotary joint as known from the state of the art.
  • the supply of air blown by the ventilation means is effected by means of a distribution chamber 8 whose function is to distribute homogeneously the flow of air blown over the entire annular section of the first channel 50.
  • the section of the distribution chamber is thus dimensioned for this purpose.
  • the fan or fans 9 are driven by one or more electric motors, the power supply is provided through the electrical connectors 10, 11, rotating.
  • the annular rings 10 are rigidly secured to the cylinder 3 of the furnace 1, and the contacts 11, rotating or sliding, are integral with the fixed frame.
  • the number of annular rings 10 depends on the electrical connection mode of motors.
  • the number of rings will be, for example, at least three (i.e. three) for motors operating with three-phase current and two for motors operating in single-phase alternating current or direct current.
  • annular ring (and an associated contact) may be added for an additional signal for controlling the electric motor (s) 9.
  • the annular distribution chamber 8 can be made between the outer wall of the cylinder 3 and an annular cowling 80 extending the inner envelope 5.
  • the metal cylinder 3 of the furnace, protected by the refractory material 73 inside, can reach several hundred degrees Celsius, even in its part located in the open air.
  • the annular rings 10 can be placed on the distribution chamber 8, which is kept at a low temperature by the air circulating thereon, on the wall of said distribution chamber 8 the outermost by relative to the cylinder 3 of the furnace 1.
  • This distribution chamber 8 may be of rectangular section.
  • the distribution chamber 8 may include vent holes 14 on said wall of the outermost distribution chamber relative to the cylinder of the oven 1 so as to let out a fraction. minor air blown by said ventilation means.
  • This minor fraction can represent between 2% and 20% of the air blown by said ventilation means and makes it possible to ensure the cooling of the annular rings 10.
  • the electrical conductors 10, 11 may be protected from the hot air stream escaping from the second channel 60 by means of an annular screen 12 disposed between said exhaust opening of the second channel 60 and said rotating electrical connectors 10, 11.
  • the cylinder 3 of the furnace being subjected to expansion / retraction due to variations in its temperature, the position of the annular rings 10 along the axis of the cylinder 3 is not unique with respect to a fixed reference.
  • the contacts 11 may be free in translation along an axis parallel to the axis of the cylinder 3 by means of guide means in translation between said contacts 11 and the frame of the oven so as to follow the displacement of the annular rings 10 during the expansion / retraction of the furnace cylinder.
  • the ventilation means may comprise several fans 9 supplying fresh air, in parallel, said distribution chamber 8 via independent circuits respectively joining each of the fans 9 to said chamber of distribution 8.
  • a self-closing valve 15 can be associated with each of said fans 9, able to close said corresponding circuit joining said fan 9 and said chamber distribution 8 in the case of a stop of said fan ( Figure 3 ).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Drying Of Solid Materials (AREA)

Claims (8)

  1. Vorrichtung (100) zum Kühlen einer Öffnung eines Drehrohrofens (1) durch Blasen von kühler Luft, wobei der Ofen einen metallischen Zylinder (3) aufweist, der innen mit einem feuerfesten Material (73) ausgekleidet ist, wobei der Zylinder (3) drehbar zu dem Gestell des Ofens angeordnet ist, in dessen Inneren Materialien dazu bestimmt sind, eingeführt und gebrannt zu werden,
    wobei die Vorrichtung zum Kühlen (100) Folgendes aufweist:
    - den Zylinder (3) des Drehofens und ein Endstück (4) des metallischen Zylinders, das mit einem feuerfesten Material (74) bedeckt ist, das an dem Zylinder (3) befestigt ist, das dazu bestimmt ist, das Ende des Zylinders (3) des Ofens vor den hohen Temperaturen zu schützen,
    - zwei konzentrische metallische Hüllen (5, 6), als Innenhülle (5) und Außenhülle (6) bezeichnet, wobei die zwei Hüllen (5, 6) den Zylinder (3) des Ofens (1) umgeben und zwei ringförmige Kanäle (50, 60) zwischen einerseits dem Zylinder (3) und der Innenhülle (5), den ersten Kanal (50), und andererseits zwischen der Innenhülle (5) und der Außenhülle (6), den zweiten Kanal (60), bilden,
    - Ventilationsmittel, die geeignet sind, das Zirkulieren von kühler Luft in den ringförmigen Kanälen (50, 60) zu ermöglichen,
    um das Zirkulieren von kühler Luft in dem ersten Kanal (50) bis zu dem Endstück (4) und dann das Zirkulieren von Luft in entgegengesetzter Richtung in dem zweiten Kanal (60) vor dem Austreten der Luft durch eine Austrittsöffnung des zweiten Kanals (60) zu ermöglichen,
    dadurch gekennzeichnet, dass sie Folgendes aufweist:
    - eine ringförmige Verteilungskammer (8), die den Zylinder (3) umgibt und an dem Zylinder (3) des Ofens befestigt ist, die den ersten Kanal (50) mit Luft versorgt,
    - die Ventilationsmittel, die mindestens einen Ventilator (9) und einen Elektromotor aufweisen, der den mindestens einen Ventilator (9) betätigt, wobei die Ventilationsmittel auf dem Metallzylinder (3) des Ofens gelagert sind, mit ihm drehbar montiert sind, die Verteilungskammer (8) luftdicht versorgen,
    - drehbare elektrische Verbinder (10, 11), die ringförmige Ringe (10), die die Zylinder (3) des Ofens umgeben, und Kontakte (11) aufweisen, die geeignet sind, auf den ringförmigen Ringen (10) während der Drehung des Ofens zu gleiten oder zu rollen, um die Stromversorgung des oder der Elektromotoren der Ventilationsmittel zu ermöglichen.
  2. Vorrichtung nach Anspruch 1, wobei die ringförmigen Ringe (10) auf der Verteilungskammer (8) angeordnet sind, an der äußersten Wand der Verteilungskammer (8) im Hinblick auf den Zylinder (3) des Ofens.
  3. Vorrichtung nach Anspruch 2, wobei die Verteilungskammer (8) Entlüftungsöffnungen (14) auf der Wand der äußersten Verteilungskammer (8) aufweist, im Hinblick auf den Zylinder des Ofens (1), derart, dass sie einen geringen Teil der Luft austreten lässt, die durch die Ventilationsmittel geblasen wird, der insbesondere zwischen 2 % und 20 % der Luft, die durch die Ventilationsmittel geblasen wird, ausmacht.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, wobei eine ringförmige Abschirmung (12) zwischen der Austrittsöffnung des zweiten Kanals (60) und den drehbaren elektrischen Verbindern (10, 11) angeordnet ist.
  5. Vorrichtung nach einem der Ansprüche 1 bis 4, wobei die ringförmigen Ringe (10) fest mit dem Zylinder des Ofens (1) verbunden sind und die drehbaren oder gleitenden Kontakte (11) mit dem Gestell verbunden sind, wobei die Kontakte (11) entlang einer Achse frei verschiebbar sind, die parallel zu der Achse des Zylinders (3) ist, mittels translatorischen Führungsmitteln zwischen den Kontakten (11) und dem Gestell des Ofens, um dem Verschieben der ringförmigen Ringe (10) bei der Ausdehnung/Zusammenziehung des Zylinders des Ofens zu folgen.
  6. Vorrichtung nach einem der Ansprüche 1 bis 5, wobei die kühle Luft, die von dem mindestens einen Ventilator (9) angesaugt wird, vor ihrem Eintreten in den Ventilator (9) in einer Hülle zirkuliert, die den Elektromotor des Ventilators (9) umgibt.
  7. Vorrichtung nach einem der Ansprüche 1 bis 6, wobei die Ventilationsmittel mehrere Ventilatoren (9) aufweisen, die der Verteilungskammer (8) über unabhängige Kreisläufe, die jeweils jeden der Ventilatoren (9) mit der Verteilungskammer (8) verbinden, parallel kühle Luft zuführen, wobei ein selbstschließendes Ventil (15) mit jedem der Ventilatoren (9) verbunden ist, das geeignet ist, den entsprechenden Kreislauf, der mit dem Ventilator (9) und der Verteilungskammer (8) verbunden ist, im Falle eines Stillstands des Ventilators zu schließen.
  8. Drehrohrofen (1), der mit einer derartigen Vorrichtung zum Kühlen nach einem der Ansprüche 1 bis 7 ausgestattet ist.
EP11815761.9A 2011-12-23 2011-12-23 Vorrichtung zur kühlung der öffnung eines drehrohrofens mittels kühlluftblasung Not-in-force EP2795217B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11815761T PL2795217T3 (pl) 2011-12-23 2011-12-23 Urządzenie do chłodzenia wylotu obrotowego pieca rurowego przez wdmuchiwanie chłodnego powietrza

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2011/000678 WO2013093212A1 (fr) 2011-12-23 2011-12-23 Dispositif de refroidissement d'une embouchure d'un four tubulaire rotatif par soufflage d'air frais

Publications (2)

Publication Number Publication Date
EP2795217A1 EP2795217A1 (de) 2014-10-29
EP2795217B1 true EP2795217B1 (de) 2016-03-02

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EP11815761.9A Not-in-force EP2795217B1 (de) 2011-12-23 2011-12-23 Vorrichtung zur kühlung der öffnung eines drehrohrofens mittels kühlluftblasung

Country Status (12)

Country Link
US (1) US9746243B2 (de)
EP (1) EP2795217B1 (de)
JP (1) JP6043363B2 (de)
CN (1) CN104053962B (de)
BR (1) BR112014015246B1 (de)
CA (1) CA2858156C (de)
DK (1) DK2795217T3 (de)
ES (1) ES2566782T3 (de)
MX (1) MX345436B (de)
PL (1) PL2795217T3 (de)
UA (1) UA109741C2 (de)
WO (1) WO2013093212A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2861052T3 (es) * 2015-04-30 2021-10-05 Hisamitsu Pharmaceutical Co Composición tópica que comprende oxibutinina para el tratamiento de la hiperhidrosis
JP6518200B2 (ja) * 2016-02-02 2019-05-22 Ｊｘ金属株式会社 ロータリーキルン炉の耐火物構造の施工方法
US10155190B2 (en) 2016-10-20 2018-12-18 General Electric Technology Gmbh System and method for reducing carbon dioxide emissions from a flue gas
DE102018220727A1 (de) * 2018-11-30 2020-06-04 Thyssenkrupp Ag Ofen mit einem Schutzsegment am Ofenauslauf

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2159118A5 (en) 1972-06-20 1973-06-15 Steffens Gmbh Karl Cooling of rotary kilns - to protect exit lip against high temp distortion
JPS53145367A (en) * 1977-05-23 1978-12-18 Kawasaki Heavy Ind Ltd Rotary kiln furnace
FR2410802A1 (fr) 1977-12-05 1979-06-29 Fives Cail Babcock Dispositif de protection de l'embouchure d'un four rotatif
FR2443654A1 (fr) 1978-12-07 1980-07-04 Fives Cail Babcock Dispositif de protection de l'embouchure d'un four rotatif
FR2494827A2 (fr) 1980-11-21 1982-05-28 Fives Cail Babcock Dispositif de protection de l'embouchure d'un four rotatif
US4376280A (en) * 1981-04-01 1983-03-08 The Direct Reduction Corporation Instrument system for iron oxide reducing kilns
US4707175A (en) * 1985-12-23 1987-11-17 Ppg Industries, Inc. Method of preheating pulverulent batch material
US4836775A (en) * 1985-12-23 1989-06-06 Ppg Industries, Inc. Air cooled rotary kiln collar
JP2517642Y2 (ja) * 1991-05-09 1996-11-20 株式会社タクマ ロータリーキルン
DE102004014872A1 (de) 2004-03-26 2005-10-13 Khd Humboldt Wedag Ag Auslaufende eines Drehrohrofens
JP2006029667A (ja) * 2004-07-15 2006-02-02 Kogure Seisakusho:Kk ロータリキルンのシェル冷却装置及び冷却方法並びにロータリキルンの排熱回収方法

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Publication number Publication date
CA2858156C (fr) 2018-12-04
US9746243B2 (en) 2017-08-29
BR112014015246A2 (pt) 2017-06-13
CN104053962B (zh) 2016-06-22
PL2795217T3 (pl) 2016-06-30
UA109741C2 (uk) 2015-09-25
EP2795217A1 (de) 2014-10-29
CA2858156A1 (fr) 2013-06-27
CN104053962A (zh) 2014-09-17
JP2015508483A (ja) 2015-03-19
MX345436B (es) 2017-01-30
JP6043363B2 (ja) 2016-12-14
US20140377713A1 (en) 2014-12-25
WO2013093212A1 (fr) 2013-06-27
BR112014015246B1 (pt) 2018-04-10
BR112014015246A8 (pt) 2017-06-13
MX2014007636A (es) 2014-09-26
DK2795217T3 (en) 2016-04-04
ES2566782T3 (es) 2016-04-15

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