EP0053049B1 - Dispositif de protection de l'embouchure d'un four rotatif - Google Patents

Dispositif de protection de l'embouchure d'un four rotatif Download PDF

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Publication number
EP0053049B1
EP0053049B1 EP81401602A EP81401602A EP0053049B1 EP 0053049 B1 EP0053049 B1 EP 0053049B1 EP 81401602 A EP81401602 A EP 81401602A EP 81401602 A EP81401602 A EP 81401602A EP 0053049 B1 EP0053049 B1 EP 0053049B1
Authority
EP
European Patent Office
Prior art keywords
flange
shell
kiln
metal
kiln shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81401602A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0053049A1 (fr
Inventor
Alain Chielens
Bernard Boussekey
Bernard Deschamps
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 Cail Babcock SA
Original Assignee
Fives Cail Babcock SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Priority to AT81401602T priority Critical patent/ATE8816T1/de
Publication of EP0053049A1 publication Critical patent/EP0053049A1/fr
Application granted granted Critical
Publication of EP0053049B1 publication Critical patent/EP0053049B1/fr
Expired legal-status Critical Current

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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 specially adapted for rotary-drum furnaces

Definitions

  • the present invention relates to a device for protecting the mouth of a rotary tubular oven at the outlet end of hot products.
  • a device of this type consisting of a ring of refractory material which covers the inner surface of the end of the furnace shell and the front face of a metal flange fixed on the end of the latter.
  • the flange and the end of the ferrule are cooled by the circulation of air supplied and discharged by two annular section passages formed between the furnace ferrule and two concentric ferrules thereto.
  • the flange is secured to a metal ring supporting the ring of refractory material (see EP-A- ⁇ 12 660).
  • the object of the present invention is to improve this device by also ensuring the cooling of the interior surface of the shell of the furnace.
  • the protective device object of the present invention is characterized in the metal ring supporting the ring in refractory material is disposed inside the shell, concentrically thereto, the said metal ring is spaced radially from the interior surface of the furnace shell, and the space thus provided communicates, on the one hand, with the outer annular passage by passages formed between the flange and the end of the furnace shell and, on the other hand, with the passage inner ring by holes drilled in the shell of the oven, away from its end.
  • Baffle plates partially block the end of the interior passage adjacent to the flange and cause the deflection of part of the air supplied by one of the passages to the space formed between the metal ring and the shell of the furnace. so as to ensure the simultaneous cooling of the interior and exterior surfaces of the shell.
  • the protective device is advantageously formed, in a conventional manner, of contiguous segments, each segment consisting of one or more blocks of concrete or refractory bricks attached to a metal support, said blocks forming the ring of refractory material and the supports metal constituting the flange and the metal ring.
  • the metal supports of the segments are kept away from the furnace shell by cleats fixed on these supports or on the shell.
  • the segments are positioned radially by means of cleats placed between the internal surface of the furnace shell and the part of the supports forming the metal ring, and by lugs fixed on the part of the supports forming the flange and in contact with the external surface. of the oven shell.
  • the deflecting sheets can be fixed on these legs.
  • the segments may be fixed to the furnace by means of rods arranged parallel to the axis of the furnace, outside the shell, and one end of which is attached to lugs secured to the supports, and of elastic elements bearing on the shell of the oven and exerting a tensile force on the other end of the rods.
  • These elastic elements may consist of elastic washers compressed between lugs welded to the ferrule and nuts screwed onto the threaded end of the rods.
  • the cooling air can be supplied by an annular distributor surrounding the oven.
  • the air coming from the distributor will be blown either in the external passage or in the internal passage, at their end remote from the flange.
  • Seals will be provided between the distributor and the ferrules delimiting the passage where the air is blown.
  • These joints may be formed of flexible sheets partially overlapping, fixed on the distributor and rubbing on the ferrules.
  • the furnace consists of a metal shell 10 and an interior lining of refractory bricks 12. This coating ends at a certain distance from the end of the shell against an annular stop 14 welded inside. of the shell 10.
  • the terminal part of the ferrule 10, between its end and the stop 14, is protected by a ring formed by several contiguous segments constituted by concrete blocks molded on metal supports to which they are attached by anchoring elements.
  • Each support is formed from three parts: an inner part 16 of cylindrical shape arranged parallel to the axis of the oven, an intermediate part 18 plane and perpendicular to the part 16 and an outer part 20 parallel to the axis of the oven.
  • This support can be in one piece and come from the foundry or formed from parts assembled by welding.
  • the parts 16 and 20 form two concentric rings and of the same axis as the ferrule 10, one inside and the other outside the ferrule, and the parts 18 forming a flange connecting them.
  • each segment comprises two contiguous concrete blocks: an interior block 22 attached to part 16 of the support by means of anchoring elements 24 and an exterior block 26 attached to part 16 by means of elements anchor 28; the joint between the two blocks is located in the extension of the interior surface of part 16 of the support.
  • the coating of the supports 16-18--20 could also be formed of refractory bricks.
  • Each ring segment is fixed to the furnace by means of one or more rods 30 arranged parallel to the axis of the furnace, outside the ferrule 10; one end of these rods is bent in the form of a hook and engages in the notch of a tab 32 welded to the part 18 of the support; the other end of the rods is threaded and carries a nut which takes support, by means of elastic washers 33 on tabs 35 welded to the ferrule 10.
  • the part 18 of the metal support of the segments is kept away from the end of the ferrule by cleats 34 welded to the support or the ferrule.
  • the position of the segments is fixed by the lugs 32 which bear on the outer surface of the shell and by cleats 36 which provide a space 37 between the part 16 of the support and the shell; these cleats can be welded to the supports or the ferrule.
  • Two ferrules 38 and 40 are fixed concentrically on the ferrule 10 by conventional means, not shown, and form two passages with annular section 42 and 44.
  • the ring formed by the parts 20 of the segment supports surrounds the adjacent end with little play.
  • of the ferrule 38 and an asbestos braid 45 constituting a seal is compressed between the end of this ferrule and the flange formed by the parts 18 of the supports.
  • the end of the ferrule 40 is spaced from this flange, and sheets 46 forming a deflector and fixed on the lugs 32 partially close the end of the interior passage 44.
  • Holes 48 drilled in the ferrule 10, near the annular stop 14 communicate the space 37, formed between the ferrule and the ring formed by the parts 16 of the supports of the segments, with the passage 44.
  • Fresh air supplied by an annular distributor 50 surrounding the furnace is admitted under pressure at the upstream end of the outer passage 42. Part of this air is diverted by the deflectors 46 towards the passages formed between the end of the shell 10 and the flange formed by the parts 18 of the supports of the segments, penetrates through these passages in the space 37 and exits therefrom the orifices 48; this current of air cools the inner surface of the ferrule 10.
  • the cleats 34 and 36 are sufficiently circumferentially spaced on the ferrule 10 so as not to hinder this flow of air.
  • the other part of the air enters the interior passage 44 through the slots made between the sheets 46 and the ferrules 10 and 40; this air flow cools the outer surface of the shell.
  • the distributor 50 is fixed to the cover 52 of the oven and a seal ensures the seal between the cover and the ferrule 38.
  • This seal consists of segments 54 hinged together so as to form a ring carried by the ferrule 38 and maintained with clearance between two flanges secured to the cover.
  • the seal between the distributor 50 and the ferrule 40 is ensured by a so-called "scale” seal which is formed from a series of flexible sheets 56 partially overlapping and which are fixed on the distributor and rub on the ferrule.
  • FIG. 2 differs from that of FIG. 1 only by the substitution of two scale seals 60 and 62 for the segment seal 54, one of the seals ensuring the seal between the hood of the oven 52 and the ferrule 38 and the other being placed between the latter and the air distributor 50.
  • the direction of air circulation has been reversed: the air coming from the distributor 50 is blown into the interior passage 44 and is evacuated by the exterior passage 42. Part of the the air flowing in the passage 44 penetrates, through the orifices 48, into the space 37 and then joins, through the passages formed between the end of the ferrule 10 and the flange formed by the parts 18 of the supports for the segments, l other part of the air which circulates around the sheets 46.
  • the total air flow is evacuated through the passage 42.
  • Flake seals 64, 66 and 68 seal between the hood of the oven 52 and the shell 38 , between the air distributor 50 and the shell 40 and between the distributor and the shell 10, respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Crushing And Grinding (AREA)
  • Drying Of Solid Materials (AREA)
  • Furnace Details (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
EP81401602A 1980-11-21 1981-10-15 Dispositif de protection de l'embouchure d'un four rotatif Expired EP0053049B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81401602T ATE8816T1 (de) 1980-11-21 1981-10-15 Vorrichtung zum schutz des einlaufendes eines drehrohrofens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8024728A FR2494827A2 (fr) 1980-11-21 1980-11-21 Dispositif de protection de l'embouchure d'un four rotatif
FR8024728 1980-11-21

Publications (2)

Publication Number Publication Date
EP0053049A1 EP0053049A1 (fr) 1982-06-02
EP0053049B1 true EP0053049B1 (fr) 1984-08-01

Family

ID=9248217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401602A Expired EP0053049B1 (fr) 1980-11-21 1981-10-15 Dispositif de protection de l'embouchure d'un four rotatif

Country Status (8)

Country Link
US (1) US4370128A (enrdf_load_stackoverflow)
EP (1) EP0053049B1 (enrdf_load_stackoverflow)
JP (1) JPS57115671A (enrdf_load_stackoverflow)
AT (1) ATE8816T1 (enrdf_load_stackoverflow)
CA (1) CA1174462A (enrdf_load_stackoverflow)
DE (1) DE3165253D1 (enrdf_load_stackoverflow)
DK (1) DK148727C (enrdf_load_stackoverflow)
FR (1) FR2494827A2 (enrdf_load_stackoverflow)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4836775A (en) * 1985-12-23 1989-06-06 Ppg Industries, Inc. Air cooled rotary kiln collar
FR2618215B1 (fr) * 1987-07-17 1990-03-30 Fives Cail Babcock Dispositif de protection de l'embouchure d'un four rotatif.
US4932863A (en) * 1987-09-14 1990-06-12 Anderson Russell W Heat loss reduction in rotating drum dryers
SE466971B (sv) * 1990-09-17 1992-05-04 Flaekt Ab Saett och anordning foer kylning av en roterugn
US5383672A (en) * 1992-08-28 1995-01-24 Pe Flo-Tech, Inc. Seal structure for rotary kiln
US5571269A (en) * 1995-04-06 1996-11-05 Buelow; Karl Rotary seal assembly for rotary drum
US6152729A (en) * 1997-08-28 2000-11-28 Maumee Research & Engineering, Inc. Spray cooled furnace discharge assembly
US8523563B1 (en) * 2008-01-07 2013-09-03 Anthony Nardella Kiln brick protective collar
PL2795217T3 (pl) * 2011-12-23 2016-06-30 Fives Fcb Urządzenie do chłodzenia wylotu obrotowego pieca rurowego przez wdmuchiwanie chłodnego powietrza
USD910832S1 (en) 2019-04-24 2021-02-16 Anthony Nardella Kiln brick protective collar with tabs
USD892297S1 (en) 2019-04-24 2020-08-04 Anthony Nardella Kiln brick protective collar
USD910831S1 (en) 2019-04-24 2021-02-16 Anthony Nardella Kiln brick protective collar with adjustable tabs
USD889628S1 (en) 2019-04-24 2020-07-07 Anthony Nardella Kiln brick protective collar with adjustable tab
USD907190S1 (en) 2019-04-24 2021-01-05 Anthony Nardella Kiln brick protective collar with apertures
USD889629S1 (en) 2019-04-24 2020-07-07 Anthony Nardella Kiln brick protective collar
USD934408S1 (en) 2020-01-22 2021-10-26 Anthony Nardella Hinged kiln brick protective collar
US11466934B2 (en) 2020-01-22 2022-10-11 Anthony Nardella Hinged kiln brick protective collar
USD951425S1 (en) 2020-01-22 2022-05-10 Anthony Nardella Hinged kiln brick protective collar

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1998492A (en) * 1932-05-25 1935-04-23 Christensen Aage Air-sealed joint for rotary incinerator drums
US2266396A (en) * 1941-05-31 1941-12-16 Allis Chalmers Mfg Co Rotary kiln
DE900671C (de) * 1951-01-27 1953-12-28 Miag Vertriebs Gmbh Gekuehlter Auslauf fuer Drehoefen
DE938839C (de) * 1953-05-08 1956-02-09 Miag Vertriebs Gmbh Gekuehlter Auslauf fuer Drehoefen
US3682453A (en) * 1970-11-23 1972-08-08 California Portland Cement Co Rotary kiln nose ring
DE2329061A1 (de) * 1973-06-07 1975-01-02 Kloeckner Humboldt Deutz Ag Luftgekuehlter auslaufring fuer einen drehrohrofen
DE2557846A1 (de) * 1975-12-22 1977-06-30 Hilti Ag Befestigungselement fuer feuerfeste auskleidungen
US4083752A (en) * 1976-11-10 1978-04-11 Monsanto Company Rotary retort
FR2443654A1 (fr) * 1978-12-07 1980-07-04 Fives Cail Babcock Dispositif de protection de l'embouchure d'un four rotatif

Also Published As

Publication number Publication date
US4370128A (en) 1983-01-25
ATE8816T1 (de) 1984-08-15
DK148727B (da) 1985-09-09
DE3165253D1 (en) 1984-09-06
JPH0114513B2 (enrdf_load_stackoverflow) 1989-03-13
FR2494827A2 (fr) 1982-05-28
DK468181A (da) 1982-05-22
EP0053049A1 (fr) 1982-06-02
JPS57115671A (en) 1982-07-19
FR2494827B2 (enrdf_load_stackoverflow) 1982-12-17
DK148727C (da) 1986-02-10
CA1174462A (fr) 1984-09-18

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