EP0140401A1 - Kühlelement für einen Ofen - Google Patents

Kühlelement für einen Ofen Download PDF

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Publication number
EP0140401A1
EP0140401A1 EP84201172A EP84201172A EP0140401A1 EP 0140401 A1 EP0140401 A1 EP 0140401A1 EP 84201172 A EP84201172 A EP 84201172A EP 84201172 A EP84201172 A EP 84201172A EP 0140401 A1 EP0140401 A1 EP 0140401A1
Authority
EP
European Patent Office
Prior art keywords
tubes
panel
furnaces
furnace
panels
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.)
Withdrawn
Application number
EP84201172A
Other languages
English (en)
French (fr)
Inventor
Andrea Pittini
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.)
Impianti Industriali SpA
Original Assignee
Impianti Industriali SpA
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 Impianti Industriali SpA filed Critical Impianti Industriali SpA
Publication of EP0140401A1 publication Critical patent/EP0140401A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/24—Cooling arrangements
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/0018—Cooling of furnaces the cooling medium passing through a pattern of tubes
    • F27D2009/0021—Cooling of furnaces the cooling medium passing through a pattern of tubes with the parallel tube parts close to each other, e.g. a serpentine
    • F27D2009/0024—Cooling of furnaces the cooling medium passing through a pattern of tubes with the parallel tube parts close to each other, e.g. a serpentine with contiguous tubes, which may be separately welded one to the other

Definitions

  • Panels of such a type can also be composed so as to form the crowns or a part of the crowns of such furnaces and also to form parts of the ducts which convey the fumes leaving smelting furnaces.
  • These panels can also be employed as heat exchangers for the recovery of energy in the form of hot water leaving the panels themselves.
  • sediments may be created within these panels owing to the sluggish flow of the liquid.
  • Solutions are also known which are intended to provide panels consisting of a plurality of tubes arranged in a continuous coil.
  • DE 2.745.622 in the name of DEMAG which discloses a panel formed with a coil of tubes. This panel is specifically envisaged for being installed without refractory material in the inward side towards the furnace.
  • the tubes of which the panel consists are arranged side by side and are joined together with a continuous weld along adjacent generating lines; this lay-out prevents good behaviour with regard to thermal expansion and also proper absorption of mechanical stresses.
  • Patent LU 78.707 discloses a type of panel like the preceding panel and comprising a coiled lay-out of tubes curved to suit the curvature of the side wall of the furnace.
  • the panels are not in direct contact with the inside of the furnace but are sunk within a refractory wall, the tubes of these panels being equipped with protrusions suitable for being anchored in a stable manner to the refractory structure.
  • the tubes also have a continuous weld joining them together.
  • GB 1,365,514 discloses a method to construct panels which comprise tubes. This method concerns the systems for the reciprocal positioning and anchorage of tubes located next to each other, with the possible interposing of rods or other metallic elements to join one tube to another.
  • the panels consisting of tubes and made in this way are employed, as in the DEMAG patent, without any lining, that is to say, they are arranged in direct cooperation with the inner walls of the furnace and face towards the inside of the furnace. These panels envisage a solution which anticipates the DEMAG invention.
  • Patent CA 653,798 (as US 2,179,638, EP 0025604 and SE 133.349) is known which discloses a lay-out of parallel tubes connected to the refractory wall of the furnace, with a cooling liquid running through the tubes. This system is envisaged as cooling only the crown of the furnace but can also be applied to the walls.
  • the tubes forming the panel have a complicated system of protrusions, which serve to anchor the panel itself to a wall of refractory material facing towards the inside of the furnace.
  • Patent FR 1.569.873 (as US 2,752,410, US 3,129,274, DE 3.147.337 and DE 2.943.244) discloses a cooling system with coils for the walls and crown of a furnace, the system having a very complicated structure and also being formed with one single arrangement of tubes rather than with a plurality of panels.
  • Patent FR 2.455.719 discloses a cover cooled with a liquid for the crown of a furnace.
  • This cover includes a plurality of panels conformed coil-wise, each panel consisting of a plurality of tubes joined to each other with bends.
  • the system thus disclosed has the tubes in close contact with each other and can therefore lead to problems resulting from thermal expansion.
  • Patent GB 958,348 discloses a system for the union of neighbouring tubes by means of a bar or other metallic element interposed between and welded to the tubes themselves.
  • the panels which can be constructed in this way are intended for use without a refractory lining.
  • DE-OS-2.032.829 and DE-PS-1.013.680 disclose panels consisting of tubes arranged in a coil on at least two parallel planes, the continuity of the tube passing alternately from one plane to the other.
  • DE-PS-3.202.574 discloses a panel in which the tubes are kept spaced apart. This type of panel is expensive owing to the types of tubes and connecting bends employed; moreover, the connection system is such that it makes possible the cracking and/or breakage of at least the welds.
  • lengths of tubes are arranged substantially parallel to the axis of the furnace so as to form together a curved wall.
  • the tubes are arranged vertically with a gap between them, thus permitting immediate adaptation to the curvature of the wall which it is wished to form with the panels of this invention.
  • Reciprocal anchorage of the tubes is obtained with welds between one tube and another. These welds are not continuous but are made with tracts of a short extent. The welds between neighbouring tubes are made advantageously at staggered positions.
  • the gaps between the tubes may vary between 0.5 millimetres and 2 millimetres in width, depending on the power of the furnace and on the usage parameters of the same. Such a value of the gaps enables the panel to expand freely in a direction circumferential to the furnace (or radial to the furnace if the panels form its crown).
  • the discontinuous surface positioned towards the inside of the furnace in such an arrangement of the tubes provides excellent anchorage for the slag, which thus forms a protective lining having advantageously a thickness of a few centimetres.
  • the panel is solid and stable, can be constructed more simply and therefore can be made at a lower cost.
  • the spaces between the tubes will be smaller since their function is performed by the special arrangement of the tubes themselves.
  • the tubes are merely positioned side by side, it is envisaged in the invention, as we said earlier, that the tubes are not placed in close contact with each other but that a free gap is left between neighbouring tubes. This gap, which is closed at the tracts of the welds, allows thermal expansion of the panel in the peripheral direction with accordion-wise mechanical compensation.
  • the bellows-wise staggered lay-out of the tubes enables panels of any size to be embodied without being restricted by the diameter of the tubes employed.
  • this free gap 19 depends on a plurality of factors, of which we may cite, as an example, the power of the furnace, the working cadence, the sizes of the panels and tubes, the thicknesses of the tubes, the type of cooling liquid, etc.
  • the inlet and outlet unions 17-18 respectively are positioned on the same side of the panel 10 and in its lower part in this instance. Noteworthy simplicity of hydraulic connection is obtained for the panel 10 in this way.
  • Fig.2 the tubes 11 are positioned side by side but a free gap 19 is left between them in correspondence with welded bridges 12 which can be seen in this figure.
  • welded bridges 12 which can be seen in this figure.
  • This kind of panel 10 also has an inlet 17 and outlet 18 for the cooling fluid.
  • Fig.3 shows a possible method of anchorage of panels 10 positioned next to the inside of the wall of the furnace, the wall being indicated with 14.
  • the panels 10 are shown diagrammatically and are of the type of Fig.2.
  • the panels 10 are anchored to the wall 14 with upper coupling plates 15, which in our example are H-shaped and are two in number for each panel 10 but which could be in any required number.
  • the wall 14 also comprises a lateral rib 20, which supports below itself a manifold 21 feeding cooling fluid.
  • the inlets 17 for cooling fluid in the individual panels 10 are connected to the manifold 21 with connecting tubes which are not shown here.
  • Anchorage of the panels 10 is carried out at their lower end with a fixture eyelet 16, which has already been shown in Figs.1 and which cooperates with a clamping wedge 22.
  • the eyelet 16 and wedge 22 can be replaced with equivalent means.
  • anchorage can be performed with screws of any type.
  • the type of anchorage chosen will be the one which permits the fastest installation and dismantling of the panel 10 and the employment of surfaces with a rough finish, thus enabling the costs of production and installation of the panel 10 to be reduced.
  • Plates 23 to protect the manifold 21 can also be seen in the figure.
  • Figs.4 show possible forms of embodiment of panels 10, according to the invention, which form the side wall of the furnace.
  • Fig.4a shows a normal panel 10 to form the wall of the furnace.
  • the inlet 17 and outlet 18 of the cooling fluid are positioned next to each other in the middle portion of the panel 10, this lay-out being different from that shown in Figs.1 and 2 in which the inlets and outlets 17-18 lie at the respective ends of the panel 10 itself.
  • the panel 10 has a substantially rectangular shape.
  • Fig.4b shows a panel 10 provided with an opening 24 suitable for the passage of a lance to blow in oxygen. This is obtained by envisaging the inclusion of some lengths of tube 111 shorter than the other normal lengths of tube 11.
  • Figs.5 show various types of panels 110 intended to form the crown of the furnace.
  • the panel 110 shown in Fig.5a has a shape substantially of a sector of a circular crown.
  • tubes 11 forming the panel 110 are curved according to the substantially circular-crown or truncated-cone shape of the crown of the furnace.
  • This embodiment has the purpose of permitting minimum rigidity of the panel 110 in a direction radial to the crown.
  • the crown expands "dome-wise" and the panel is deformed preferentially in a radial direction or along a generating line of the crown.
  • a supplementary lateral tube 211 can be seen which runs in a radial direction and serves to position the outlet 18 of the cooling fluid in correspondence with the outer periphery of the furnace.
  • Fig.5b shows a like panel 110 in which the tubes 11 are distributed substantially in a coil with an arrangement which becomes progressively smaller as it proceeds inwards.
  • the panel 110 of Fig.5c has a side portion missing, this portion corresponding to the space 26 for the outlet of fumes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
EP84201172A 1983-09-19 1984-08-14 Kühlelement für einen Ofen Withdrawn EP0140401A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8346383 1983-09-19
IT83463/83A IT1175125B (it) 1983-09-19 1983-09-19 Pannello raffreddato per forni

Publications (1)

Publication Number Publication Date
EP0140401A1 true EP0140401A1 (de) 1985-05-08

Family

ID=11322258

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84201172A Withdrawn EP0140401A1 (de) 1983-09-19 1984-08-14 Kühlelement für einen Ofen

Country Status (2)

Country Link
EP (1) EP0140401A1 (de)
IT (1) IT1175125B (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0217113A2 (de) * 1985-10-01 1987-04-08 MAN Gutehoffnungshütte Aktiengesellschaft Drehrohrkühler
FR2663868A1 (fr) * 1990-02-07 1992-01-03 Wurth Paul Sa Hotte a parois refroidies.
DE4223109C1 (de) * 1992-07-14 1993-09-16 Reining Heisskuehlung Gmbh & Co Kg, 4330 Muelheim, De
US5332199A (en) * 1990-09-05 1994-07-26 Fuchs Systemtechnik Gmbh Metallurgical vessel
EP0805325A1 (de) * 1996-04-30 1997-11-05 DANIELI & C. OFFICINE MECCANICHE S.p.A. Kühleinrichtung eines Lichtbogenöfendeckels
WO2004106831A1 (de) * 2003-05-27 2004-12-09 Maerz-Ofenbau Ag Prozessbehälter mit kühlelementen
JP2020524250A (ja) * 2017-06-13 2020-08-13 アメリファブ，インコーポレイテッド カセット型のドロップアウトボックス、燃焼室、ダクトおよび電気アーク炉の上部シェルシステム
CN112113428A (zh) * 2020-10-10 2020-12-22 上海宝钢铸造有限公司 双层冷却管强冷水冷炉口
US11396470B2 (en) * 2016-08-25 2022-07-26 Johns Manville Continuous flow submerged combustion melter cooling wall panels, submerged combustion melters, and methods of using same

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2179638A (en) * 1935-06-07 1939-11-14 Koppers Co Inc Gas producer
DE2032829A1 (en) * 1970-07-02 1972-01-05 Klöckner-Werke AG, 4100 Duisburg Blast furnace - coil type cooling element
LU78707A1 (de) * 1977-12-19 1978-06-21
FR2418913A1 (fr) * 1978-03-01 1979-09-28 Oschatz Gmbh Paroi etanche aux gaz pour fours industriels
FR2453376A1 (fr) * 1979-04-02 1980-10-31 Benteler Werke Ag Element de paroi de refroidissement par eau et realise a partir de tuyaux, destine a un four de fusion a arc
EP0025604A1 (de) * 1979-09-13 1981-03-25 Heinz Westerhoff Kühlelement für Industrieöfen
FR2468863A1 (fr) * 1979-10-26 1981-05-08 Demag Ag Mannesmann Couvercle de cuve pour un four de fusion de metaux, notamment pour un four electrique a arc
DE3202574C1 (de) * 1982-01-27 1983-02-24 SIDEPAL S.A. Société Industrielle de Participations Luxembourgeoise, Luxembourg Kuehlvorrichtung fuer Wandkonstruktionen und/oder Deckelkonstruktionen von Industrieoefen
DE3231224A1 (de) * 1982-08-21 1984-04-05 SIDEPAL S.A. Société Industrielle de Participations Luxembourgeoise, Luxembourg Kuehlelement fuer industrieoefen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2179638A (en) * 1935-06-07 1939-11-14 Koppers Co Inc Gas producer
DE2032829A1 (en) * 1970-07-02 1972-01-05 Klöckner-Werke AG, 4100 Duisburg Blast furnace - coil type cooling element
LU78707A1 (de) * 1977-12-19 1978-06-21
FR2418913A1 (fr) * 1978-03-01 1979-09-28 Oschatz Gmbh Paroi etanche aux gaz pour fours industriels
FR2453376A1 (fr) * 1979-04-02 1980-10-31 Benteler Werke Ag Element de paroi de refroidissement par eau et realise a partir de tuyaux, destine a un four de fusion a arc
EP0025604A1 (de) * 1979-09-13 1981-03-25 Heinz Westerhoff Kühlelement für Industrieöfen
FR2468863A1 (fr) * 1979-10-26 1981-05-08 Demag Ag Mannesmann Couvercle de cuve pour un four de fusion de metaux, notamment pour un four electrique a arc
DE3202574C1 (de) * 1982-01-27 1983-02-24 SIDEPAL S.A. Société Industrielle de Participations Luxembourgeoise, Luxembourg Kuehlvorrichtung fuer Wandkonstruktionen und/oder Deckelkonstruktionen von Industrieoefen
DE3231224A1 (de) * 1982-08-21 1984-04-05 SIDEPAL S.A. Société Industrielle de Participations Luxembourgeoise, Luxembourg Kuehlelement fuer industrieoefen

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0217113A2 (de) * 1985-10-01 1987-04-08 MAN Gutehoffnungshütte Aktiengesellschaft Drehrohrkühler
EP0217113A3 (en) * 1985-10-01 1988-03-02 Man Gutehoffnungshutte Gmbh Rotary cooler
FR2663868A1 (fr) * 1990-02-07 1992-01-03 Wurth Paul Sa Hotte a parois refroidies.
US5332199A (en) * 1990-09-05 1994-07-26 Fuchs Systemtechnik Gmbh Metallurgical vessel
DE4223109C1 (de) * 1992-07-14 1993-09-16 Reining Heisskuehlung Gmbh & Co Kg, 4330 Muelheim, De
EP0579146A1 (de) * 1992-07-14 1994-01-19 Hammer, Friedrich-Wilhelm Gekühltes Wandelement für metallurgische Öfen
EP0805325A1 (de) * 1996-04-30 1997-11-05 DANIELI & C. OFFICINE MECCANICHE S.p.A. Kühleinrichtung eines Lichtbogenöfendeckels
US5923697A (en) * 1996-04-30 1999-07-13 Danieli & C. Officine Meccaniche Spa Cooling device for the roof in electric arc furnaces
WO2004106831A1 (de) * 2003-05-27 2004-12-09 Maerz-Ofenbau Ag Prozessbehälter mit kühlelementen
US7544321B2 (en) 2003-05-27 2009-06-09 Maerz-Ofenbau Ag Process container with cooling elements
US11396470B2 (en) * 2016-08-25 2022-07-26 Johns Manville Continuous flow submerged combustion melter cooling wall panels, submerged combustion melters, and methods of using same
JP2020524250A (ja) * 2017-06-13 2020-08-13 アメリファブ，インコーポレイテッド カセット型のドロップアウトボックス、燃焼室、ダクトおよび電気アーク炉の上部シェルシステム
CN112113428A (zh) * 2020-10-10 2020-12-22 上海宝钢铸造有限公司 双层冷却管强冷水冷炉口

Also Published As

Publication number Publication date
IT1175125B (it) 1987-07-01
IT8383463A0 (it) 1983-09-19

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Withdrawal date: 19850520

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Inventor name: PITTINI, ANDREA