EP1137814A1 - Plaque de refroidissement et systeme de refroidissement pour paroi de four verticale - Google Patents

Plaque de refroidissement et systeme de refroidissement pour paroi de four verticale

Info

Publication number
EP1137814A1
EP1137814A1 EP99971469A EP99971469A EP1137814A1 EP 1137814 A1 EP1137814 A1 EP 1137814A1 EP 99971469 A EP99971469 A EP 99971469A EP 99971469 A EP99971469 A EP 99971469A EP 1137814 A1 EP1137814 A1 EP 1137814A1
Authority
EP
European Patent Office
Prior art keywords
cooling
cooling plate
plate
cooling device
upper edge
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Withdrawn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
EP99971469A
Other languages
German (de)
English (en)
Inventor
Robert Schmeler
Wilhelm Burgmann
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.)
Paul Wurth SA
Original Assignee
Paul Wurth 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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP1137814A1 publication Critical patent/EP1137814A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor

Definitions

  • the present invention relates to a cooling plate and cooling device for a substantially vertical furnace wall, in particular in a metallurgical furnace.
  • the object of the present invention is to reduce the safety risk that such leaks in cooling devices on vertical furnace walls represent.
  • a cooling plate like the known cooling plates from shaft furnaces, essentially comprises a front, a rear, two side edges, an upper edge and a lower edge as the jacket surfaces.
  • the front faces the inside of the furnace and the back of the vertical furnace wall.
  • the upper edge of the cooling plate is designed such that it only drains a liquid that trickles down onto it to the rear of the cooling plate.
  • the upper edge of such a cooling plate points towards the front e.g. an upwardly projecting nose which is designed to prevent a liquid which drizzles down onto the upper edge from flowing off towards the front of the cooling plate.
  • Such cooling plates are placed on a vertical furnace wall below
  • B1_S ⁇ nGUN6 $ K0PIE an upper cooling device arranged such that its upper edges engage under the upper cooling device, a cooling liquid that may trickle down from a leak in the upper cooling device is largely collected by one of these upper edges and drained off to the rear of the cooling plate. This prevents the coolant flowing down from a leak from entering the refractory mass in large quantities at the front of the cooling plate, or accumulating inside the furnace.
  • a controlled, rearward discharge of the cooling liquid emerging from a leak in the upper cooling device ensures that such a leak is easier to determine and to locate.
  • the upper edge of the cooling plate is designed as a collecting trough which has an outlet opening to the rear of the cooling plate.
  • the liquid collected from the upper edge of the cooling plate is thus drained through this outlet opening.
  • This is advantageous compared to an opening in a jacket plate of the furnace wall, so that leaks are relatively easy to determine and locate. If the corresponding outlet opening of the collecting trough is then assigned an outlet device which protrudes through the opening in the jacket plate, the detection of leaks is further simplified.
  • a discharge device can e.g. also be assigned a liquid detector which immediately reports the occurrence of a leak above a certain cooling plate.
  • the gutter in the upper edge advantageously has a slope to the outlet opening. You can additionally or alternatively in both
  • the cooling plates according to the invention can be used on a substantially vertical furnace wall as a lower cooling device which is arranged below an upper cooling device with cooling pipes made of steel or copper.
  • Cooling plates then ensure the cooling of the furnace wall in its strong loaded lower area, and the cooling tubes in their less heavily loaded upper area.
  • the copper cooling plates are, due to their large wall thickness and the high aging resistance of the copper under the influence of heat, relatively unaffected by leaks. With their upper edge designed according to the invention, they enable effective detection of small leaks in the cooling pipes and prevent unnoticed penetration of larger amounts of liquid from such leaks into the refractory mass or into the interior of the furnace.
  • the cooling plates can also be used in a cooling device of a substantially vertical furnace wall as the lower cooling device, which is arranged below an upper cooling device with further cooling plates.
  • the lower edge of an upper cooling plate is narrower than the upper edge of a lower cooling plate.
  • the shape of the lower edge of an upper cooling plate is advantageously complementary to the shape of the upper edge of a lower cooling plate, so that the upper edge of a lower cooling plate can partially cover the lower edge of an upper cooling plate.
  • the lower edge of an upper cooling plate then projects e.g. into the gutter, which is formed by the upper edge of a lower cooling plate.
  • a cooling device can also comprise a plurality of rows of cooling plates according to the invention, the lower edges of the cooling plates of a row being undercut from the upper edges of the cooling plates of the row immediately below.
  • FIG. 2 shows a rear view of the vertical furnace wall of FIG. 1, the section line 1 -1 indicating the section of FIG. 1; 3: a section of a vertical furnace wall with a second exemplary embodiment of a cooling device according to the invention.
  • the furnace wall shown as a detail in the figures is, for example, the side furnace wall of an electric furnace, such as is used, for example, to produce steel.
  • the interior of the furnace is designated by reference number 10.
  • a vertical furnace jacket sheet 12 can be seen, which is clad to the furnace interior 10 with a cooling device according to the invention.
  • the cooling device shown in Figures 1 and 2 consists of a lower cooling device with cooling plates 14 and an upper cooling device with cooling tubes 16.
  • Each of the cooling plates 14 of the lower cooling device comprises a solid plate body, preferably made of copper or a copper alloy, in the cooling channels 18 a closed Form the cooling circuit.
  • This plate body has the following lateral surfaces: a front side 20 which faces the furnace interior 10; a rear side 22 facing the furnace jacket sheet 12; two side edges that delimit the plate body on the right and left; an upper edge 24 which delimits the cooling plate upwards and a lower edge 26 which delimits the cooling plate downwards.
  • the front side 20 of the cooling plate 14 has cooling fins 28 in a known manner, which enlarge the cooling surface towards the inside of the furnace 10 and at the same time anchor a sprayed-on refractory material 30 on the cooling plate 14.
  • the rear side 22 has an essentially smooth surface, the curvature of which may be adapted to the curvature of the furnace jacket sheet 12.
  • Two connecting pieces 32 on the rear side 22 of the cooling plate 14 make it possible to flow through the cooling circuit of the cooling plate 14 formed by the cooling channels 18 with a liquid coolant, generally cooling water.
  • the cooling tubes 16 of the upper cooling device are steel or copper tubes which are fastened to a carrier plate 34 and are embedded in the refractory material 30.
  • the support plate 34 extends between the cooling plates 14 and the furnace jacket plate 12 to a support plate 36 on which the lower
  • the upper edge 24 of the cooling plates 14 is designed such that it only drains cooling water, which may trickle down onto it from a leak in the upper cooling pipes 16, to the rear side 22 of the cooling plate 14.
  • the panel formed by the cooling tubes 16 is undercut over its entire width “B” by the somewhat wider upper edges 24 of the cooling plates 14. Cooling water, which trickles down from a smaller leakage of the cooling pipes 16, is thus largely collected from the upper edge 24 of one of these cooling plates 14, in order to then be drained off to the rear side 22 of this cooling plate 14.
  • the upper edges 24 of the cooling plates 14 have, in each case towards the front 20, an upwardly projecting nose 38 which is designed in such a way that it prevents a liquid from trickling down onto the upper edge 24 towards the front 20 of the cooling plate 14 flows out.
  • the collected trickle water consequently always flows off to the rear side 22 of the cooling plate 14 and consequently does not get into the refractory material 30 on the front side 20 of the cooling plate 14 or into the interior of the furnace 10.
  • the trickle water then largely flows between the rear side 22 of the cooling plate 14 and the inside of the jacket plate 12 down. Part of the trickle water can also through an upper opening 40 in the jacket plate 12, through which u.a.
  • the connecting pieces 32 are led out, flow over, then trickle down on the outside of the jacket plate 12. In both cases, the leakage is relatively easy to determine. It should be noted that the proportion of the trickle water that flows through the upper opening 40 in the casing sheet 12, of course, by appropriate sealing measures, such as. Sealant or welds between the back 22 of the cooling plate 14, the support plate 34 and the inside of the jacket plate 12, can be increased.
  • the lower edges of the cooling plates 26 is inserted 14 in a sort of retention basin, which is a kind containment dam 42 and limited to the furnace exterior, for example, through the furnace casing plate 12 downward by the support plate 36, inside of the furnace 10 by w.
  • the Water trickling down between the back 22 of the cooling plate 14 and the inside of the jacket sheet 12 is collected in this retention basin. It leaves the retention basin through lower openings 44 in the casing sheet 12 to the outside of the furnace. Leakage water from leaks is therefore always visibly discharged to the outside.
  • the cooling device shown in FIG. 3 differs from that
  • Cooling device of Figures 1 and 2 first, by a different design of the upper edges of the cooling plates 114, 214, and second, by two rows of cooling plates 1 14, 214 arranged one above the other. These differences are explained in more detail below.
  • the upper edge 124 of the lower cooling plate 114, or the upper edge 224 of the upper cooling plate 214, is in each case designed as a collecting trough. It has, just like a cooling plate 14 of FIGS. 1 and 2, in each case towards the front 20, an upwardly projecting nose 38, which prevents liquid from trickling down onto the upper edge 124, 224 towards the front 20 of the Cooling plate 114, 214 flows out. In addition, however, it also points toward the rear side 22, an upwardly projecting nose 127, 227, which prevents the liquid which trickles down onto the upper edge 124, 224 from the entire length of the upper edge 124, 224 to the rear 22 of the cooling plate 114, 214 can flow out.
  • the rear lug 127 extends continuously over the entire length of the upper edge 124.
  • the trickle water collected in the gutter flows out through an outlet pipe 128, which seals into a bore 131 which opens into the gutter at the low point of the gutter is inserted.
  • This outflow pipe 128 is led out, for example, through the opening 40 in the jacket plate 12, where it can open, for example, into an outer gutter (not shown).
  • the trickle water collected in the gutter flows out through a cutout in the rear nose 226 and is advantageously conducted through a opening 228 in the opening 40 in the jacket plate 12.
  • the gutter consists of integrating an outflow channel into a hook (not shown), which is attached to the rear of the cooling plate for hooking the cooling plate into an opening in the jacket plate 12.
  • the collecting trough itself advantageously has an inclination to its outlet device. It can also be closed off at the level of the two side edges of the cooling plates 114, 214 by a side dam, so that this dam prevents the trickle water from escaping from the side of the collecting channel. It should also be noted that the rear lug 127, 227 is lower than the front lug 38, so that if the outlet device of the collecting channel becomes blocked, the trickle water will still flow to the rear 22 of the cooling plate 114, 214.
  • Allow trickle water e.g. a simple liquid detector can be assigned to each outlet device, which immediately reports the occurrence of trickle water to a particular cooling plate to the operator of the furnace.
  • the lower edge 226 of the upper cooling plate 214 is designed to be complementary to the upper edge 124 of the lower cooling plate 114, and projects into the collecting channel formed by this edge 124.
  • the lower edge 226 of the upper cooling plate 214 here forms a type of drip nose, which lies between the lugs 38 and 127, which form the collecting channel of the lower cooling plate 114.
  • this drip nose there must be enough free space between this drip nose and the upper edge 124 of the lower cooling plate 114 so that this upper edge 124 can still fulfill its diverting function.
  • Cooling pipe panels 116 are arranged above the cooling plates 214 of the second row. The latter could of course also be replaced by a third row of cooling plates. It should be noted that the cooling device of FIG. 3 could of course also be covered with a refractory material towards the inside of the furnace.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Blast Furnaces (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)

Abstract

L'invention concerne un système de refroidissement pour paroi de four sensiblement verticale, qui comprend un dispositif de refroidissement inférieur formé de plaques de refroidissement (14), ainsi qu'un dispositif de refroidissement supérieur. A cet effet, le dispositif de refroidissement supérieur est pris par en dessous par les arêtes supérieures (24) des plaques de refroidissement (14), de manière qu'un liquide de refroidissement s'écoulant d'une fuite provenant des tubes de refroidissement, soit collecté en majeure partie par une de ces arêtes supérieures (24) et soit exclusivement évacué vers la face arrière (22) de la plaque de refroidissement (14).
EP99971469A 1998-11-04 1999-11-03 Plaque de refroidissement et systeme de refroidissement pour paroi de four verticale Withdrawn EP1137814A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
LU90313 1998-11-04
LU90313A LU90313B1 (de) 1998-11-04 1998-11-04 Kuehlplatte und Kuehlvorrichtung fuer eine senkrechte Ofenwand
PCT/EP1999/008406 WO2000026419A1 (fr) 1998-11-04 1999-11-03 Plaque de refroidissement et systeme de refroidissement pour paroi de four verticale

Publications (1)

Publication Number Publication Date
EP1137814A1 true EP1137814A1 (fr) 2001-10-04

Family

ID=19731779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99971469A Withdrawn EP1137814A1 (fr) 1998-11-04 1999-11-03 Plaque de refroidissement et systeme de refroidissement pour paroi de four verticale

Country Status (8)

Country Link
EP (1) EP1137814A1 (fr)
JP (1) JP2002528697A (fr)
AU (1) AU1378600A (fr)
BR (1) BR9915311A (fr)
LU (1) LU90313B1 (fr)
TW (1) TW473547B (fr)
WO (1) WO2000026419A1 (fr)
ZA (1) ZA200103585B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100456036B1 (ko) * 2002-01-08 2004-11-06 이호영 세로형 고로의 냉각 패널
IT1403883B1 (it) * 2010-08-06 2013-11-08 Tenova Spa Pannello raffreddato a fluido per forni metallurgici, sistema di raffreddamento per forni metallurgici comprendente tale pannello e forno metallurgico incorporante gli stessi
EP3480324B1 (fr) * 2017-11-03 2020-11-04 Berry Metal Company Paroi de refroidissement de four modulaire

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1494406A (fr) * 1966-09-19 1967-09-08 Didier Werke Ag Dispositif destiné à la protection du revêtement réfractaire des fours à cuve, notamment des hauts fourneaux, contre les fuites d'eau provenant des boîtes de refroidissement, tuyères et organes analogues
US5561685A (en) * 1995-04-27 1996-10-01 Ucar Carbon Technology Corporation Modular spray cooled side-wall for electric arc furnaces

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0026419A1 *

Also Published As

Publication number Publication date
TW473547B (en) 2002-01-21
AU1378600A (en) 2000-05-22
ZA200103585B (en) 2002-10-02
WO2000026419A1 (fr) 2000-05-11
LU90313B1 (de) 2000-07-18
JP2002528697A (ja) 2002-09-03
BR9915311A (pt) 2001-08-07

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