ZA200103585B - Cooling plate and cooling system for the vertical wall of an oven. - Google Patents
Cooling plate and cooling system for the vertical wall of an oven. Download PDFInfo
- Publication number
- ZA200103585B ZA200103585B ZA200103585A ZA200103585A ZA200103585B ZA 200103585 B ZA200103585 B ZA 200103585B ZA 200103585 A ZA200103585 A ZA 200103585A ZA 200103585 A ZA200103585 A ZA 200103585A ZA 200103585 B ZA200103585 B ZA 200103585B
- Authority
- ZA
- South Africa
- Prior art keywords
- cooling
- cooling plate
- plate
- cooling device
- top edge
- Prior art date
Links
- 238000001816 cooling Methods 0.000 title claims description 181
- 239000007788 liquid Substances 0.000 claims description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 230000014759 maintenance of location Effects 0.000 claims description 7
- 230000004888 barrier function Effects 0.000 claims description 6
- 239000000110 cooling liquid Substances 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000011819 refractory material Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
Description
P-PWU-406/WC itransiation of PCT/EP 99/0804C6 as published) 2 0 0 1 3 1 85
Cooling plate and cooling device for a vertical furnace wall
The present invention relates to a cooling plate and cooling device for an essentially vertical furnace wall, in particular in a metallurgical furnace.
Liquid-cooled cooling elements in furnaces are often affected by small leaks, which are not easily detectable and therefore generally remain unnoticed for a long time. However, these small leaks constitute a considerable safety risk particularly in metallurgical furnaces such as electric arc furnaces, electric reduction furnaces, shaft furnaces, blast furnaces, etc. The slow but continuous infiltration of trickling water from leaks into the refractory lining of the furnace destroys the latter to an increasing extent, so that ruptures in the furnace with overflow of metal or even violent explosions may occur.
The object of the present invention is to reduce the safety risk which such leaks represent in cooling devices on vertical furnace walls.
This problem is solved in accordance with the present invention by a cooling plate according to claim 1. Such a cooling plate comprises, just like known cooling plates in shaft furnaces, essentially a front side, a rear side, two lateral edges, a top edge and a bottom edge. When the cooling plate is mounted, the - front side faces the interior of the furnace and the rear side the vertical furnace wall. According to an important feature of the invention, the top edge of the cooling plate is designed in such a way that it diverts a liquid which trickles on to it, exclusively to the back of the cooling plate. For this purpose the top edge of such a cooling plate has, for example, a rib projecting upwards towards the front side, which is designed in such a way that it prevents a liquid trickling down to the top edge from flowing away to the front side of the cooling plate.
If such cooling plates are arranged on a vertical furnace wall below an upper cooling device in such a way that its top edges extend under the latter, a
P-PWU-46/WO (translation of BCT/EP 99/08C406 as pib. ished) 20013585 ® 2 cooling liquid which possibly trickles down from a leak in the upper cooling device is largely collected by one of these top edges and diverted to the rear side of the cooling plate. This prevents the cooling liquid trickling down from a leak penetrating unnoticed in large quantities into a refractory material on the front side of the cooling plate or accumulating inside the furnace. In addition it is ensured by controlled diversion to the rear of the cooling liquid emerging from a leak in the upper cooling device that such a leak can more easily be detected and located.
In an advantageous embodiment the top edge of the cooling plate is designed as a collecting channel, which has an outlet towards the rear of the cooling plate. Hence the liquid collected from the top edge of the cooling plate is diverted through this outlet. This advantageously takes place opposite an opening in a shell plate of the furnace wall, so that leaks can be detected and 16 located relatively easily. Furthermore, if an outlet device penetrating through the opening in the shell plate is then assigned to the corresponding outlet of the collecting channel, the detection of leaks is further simplified. A liquid detector, which immediately signals the occurrence of a leak above a specific cooling plate, can further be assigned to such an outlet.
The collecting channel in the top edge has advantageously a slope towards the outlet. It can additionally or alternatively be sealed on both lateral edges by a barrier to prevent overflow to the side.
The cooling plates according to the invention can be used as a lower cooling device, which is arranged below an upper cooling device with steel or copper cooling tubes, on an essentially vertical furnace wall. The cooling plates, preferably designed as solid copper plates, then ensure cooling of the furnace wall in its heavily loaded lower area and the cooling tubes in its less heavily loaded upper area. The susceptibility of copper cooling plates to leaks is relatively low, inter alia because of their thick walls and the high ageing stability of the copper under the effect of heat. With their top edge designed according
P-PWU-4CE/WC (translation of PCT/EP 99/08C406 as paslished: 2001 3585 ® 3 to the invention they permit effective detection of small leaks in the cooling tubes and prevent unnoticed penetration of substantial quantities of liquid from such leaks into the refractory material or the interior of the furnace.
However, the cooling plates can also be used as a lower cooling device, which is arranged below an upper cooling device with further cooling plates, in the cooling equipment of an essentially vertical furnace wall. In this case the bottom edge of an upper cooling plate is narrower than the top edge of a lower cooling plate. Furthermore, the shape of the bottom edge of an upper cooling plate is advantageously complementary to the shape of the top edge of a lower cooling plate, so that the top edge of a lower cooling plate may partially overlap the bottom edge of an upper cooling plate. In a preferred embodiment the bottom edge of an upper cooling plate then projects, for example, into the collecting channel, which is formed by the top edge of a lower cooling plate.
A cooling device may, of course, comprise several rows of cooling plates according to the invention, the top edges of the cooling plates in the row immediately below extending under the bottom edges of the cooling plates in a row.
An embodiment of the invention is described below on the basis of the enclosed figures, which show:
Fig. 1 a section of a vertical furnace wall with a first exemplified embodiment of a cooling device according to the invention;
Fig. 2 a rear view of the vertical furnace wall in Fig. 1, the section line 1-1 indicating the section in Fig. 1;
Fig. 3 a section of a vertical furnace wall with a second exemplified embodiment of a cooling device according to the invention.
oo 20013583
P-PWC-40€/WC (translation of PCT/EP? 93/083406 as p:blished) @® s
The furnace wall shown as a section in the figures is, for example, the lateral furnace wall of an electric furnace, as used e.g. for steel production. The interior of the furnace is designated 10. A vertical furnace shell plate 12, which is covered with a cooling device according to the invention on the side facing the furnace interior 10, can be seen.
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 from copper or a copper alloy, in which cooling ducts 18 form a closed cooling circuit. This plate body has the following surface areas: a front side 20, which faces the furnace interior 10; a rear side 22, which faces the furnace shell plate 12; two lateral edges, which limit the plate body on the right and left; a top edge 24, which limits the cooling plate at the top, and a bottom edge 26, which limits the cooling plate at the bottom. The front side 20 of the cooling plate 14 has in a known way cooling fins 28, which enlarge the cooling area facing the furnace interior 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, its curvature being adapted if necessary to the curvature of the furnace shell plate 12. Two connection pieces 32 on the rear side 22 of the cooling plate 14 permit a liquid coolant, usually cooling water, to flow through the cooling circuit of the cooling plate 14 formed by the cooling ducts 18.
The cooling tubes 16 of the upper cooling device are steel or copper tubes, which are secured to a supporting plate 34 and embedded in the refractory material 30. The supporting plate 34 extends between the cooling plates 14 and the furnace shell plate 12 to a base plate 36, on which the lower cooling plates 14 rest with their bottom edge 26.
According to an important feature of the present invention, the top edge 24 of the cooling plates 14 is designed in such a way that it diverts cooling water
P-PWU-406/WC (transiation of PCT/EP 99/0804C6 as piblisked) ® 5 which possibly trickles down on to it from a leak in the upper cooling tubes 18, exclusively to the rear side 22 of the cooling plate 14. As is clearly shown in
Fig. 1, the slightly wider top edges 24 of the cooling plates 14 extend under the panel formed by the cooling tubes 16 over its full width "B". Most of the cooling water which trickles down from a small leak in the cooling tubes 16 is thus collected by the top edge 24 of one of these cooling plates 14 in order to be diverted subsequently towards the rear side 22 of this cooling plate 14.
The top edges 24 of the cooling plates 14 have a rib 38 projecting upwards towards the front side 20 of each of them, which is designed in such a way that it prevents a liquid trickling down on to the top edge 24 from flowing away towards the front side 20 of the cooling plate 14. The collected trickling water consequently always flows towards the rear side 22 of the cooling plate 14 and thus does not penetrate into the refractory material 30 on the front side 20 of the cooling plate 14 or the furnace interior 10. On the rear side 22 of the cooling plate 14 most of the trickling water then flows downwards between the rear side 22 of the cooling plate 14 and the inside of the shell plate 12. Part of the trickling water may also flow through a top opening 40 in the shell plate 12, through which inter alia the connection pieces 32 are led out, before subsequently trickling down the outside of the shell plate 12. In both cases the leak can be detected relatively easily. It should be noted that the proportion of the trickling water flowing through the upper opening 40 in the shell plate 12 is, of course, increased by suitable sealing measures such as sealing compound or weld seams between the rear side 22 of the cooling plate 14, the supporting plate 34 and the inside of the sheli plate 12.
As can likewise be seen in Fig. 1, the bottom edges 26 of the cooling plates 14 are inserted in a type of retention basin, which is limited at the bottom by the base plate 36, from the furnace interior 10 by a type of retention barrier 42 and from the exterior of the furnace e.g. by the furnace shell plate 12. The water trickling down between the rear 22 of the cooling plate 14 and the inside of the shell plate 12 is collected in this retention basin. It leaves the retention basin
2-PWC-406/W0 (translation of PCT/EP 99/C80406 as piblished: @® 6 through bottom openings 44 in the shell plate 12 to the exterior of the furnace.
Trickling water from leaks is consequently always removed visibly to the exterior.
The cooling device shown in Fig. 3 differs from the cooling device in Figs. 1 and 2 firstly in the different design of the top edges of the cooling plates 114, 214 and secondly, by virtue of two rows of cooling plates 114, 214 arranged one above the other. These differences are explained in more detail below.
The top edge 124 of the lower cooling plate 114 or the top edge 224 of the upper cooling plate 214 is designed as a collecting channel in each case. Just like a cooling plate 14 in Figures 1 and 2, it has towards the front side 20 a rib 38 projecting upwards, which prevents a liquid trickling down on to the top edge 124, 224 from flowing away to the front side 20 of the cooling plate 114, 214. In addition, however, it also has towards the rear side 22 a rib 127, 227 projecting upwards, which prevents the liquid trickling down on to the top edge of 124, 224 from flowing away over the full length of the top edge 124, 224 to the rear side 22 of the cooling plate 114, 214.
On the lower cooling plate 114 the rear rib 127 extends continuously over the full length of the top edge 124. The trickling water collected in the collecting channel flows away via an outlet pipe 128, which is sealed into a hole 131, which terminates in the collecting channel at its lowest point. This outlet pipe 128 is led, for example, through the opening 40 in the shell plate 12, where it may terminate, for example, in an outer collecting channel (not shown). On the upper cooling plate 214 the trickling water collected in the collecting channel flows through a recess in the rear rib 226 and is advantageously led through a deflector plate 228 and the opening 40 in the shell plate 12. A likewise interesting embodiment of an outlet device of the collecting channel, because it is particularly inexpensive, consists of the integration of an outflow duct in a hook (not shown), which is secured on the back of the cooling plate for hooking the cooling plate in an opening in the shell plate 12.
P-PWJ-306/WO (translation of PCT/EP 93/080406 as piblished; ® )
The collecting channel itself has advantageously a slope towards its outlet device. It can also be sealed by a lateral barrier at the height of the two lateral edges of the cooling plates 114, 214, so that this barrier prevents lateral overflow of the trickling water from the collecting channel. It is also noticeable that the rear rib 127, 227 is lower than the front rib 38, so that the trickling water still flows away to the rear side (22) of the cooling plate 114, 214 if the outlet device of the collecting channel is blocked.
It should generally be noted that the embodiments of the cooling plates 114 and 214 permit more positive and thus more easily detectable diversion of trickling water. A simple liquid detector, which immediately signals to the furnace operator the presence of trickling water on a specific cooling piate, can then be assigned, for example, to each outlet device.
As is likewise clear from Fig. 3, the bottom edge 226 of the upper cooling plate 214 is complementary to the top edge 124 of the lower cooling plate 114 and projects into the collecting channel formed by this edge 124. The bottom edge 226 of the upper cooling plate 214 forms a type of dripping rib, which lies between the ribs 38 and 127, which form the collecting channel of the lower cooling plate 114. Sufficient space must, of course, remain between this dripping rib and the top edge 124 of the lower cooling plate 114, so that this top edge 124 can still fulfil its diversion function.
Cooling tube panels 16 are arranged above the cooling plates 214 of the second row. These panels could, of course, also be replaced by a third row of cooling plates. It should be noted that the cooling device in Figure 3 could, of course, also be covered with a refractory material on the side facing the furnace interior.
Claims (1)
- P-PWU-4C6/W0O i(trans.iation of PCT/EP 99/080406 as pibiished; ® : PATENT CLAIMS1. Cooling plate for lining an essentially vertical furnace wall, comprising a front side (20), a rear side (22), two lateral edges, a top edge (24, 124, 224) and a bottom edge (26,226), the front side (20) facing the furnace interior (10) and the rear side (22) the vertical furnace wall when the cooling plate is fitted, characterised in that the top edge (24, 124, 224) of the cooling plate (14, 114, 214) is designed in such a way that it diverts a liquid trickling down on to it exclusively to the rear side (22) of the cooling plate (14, 114, 214).10 .2. Cooling plate according to claim 1, characterised in that the top edge (24, 124, 224) of the cooling plate (14, 114, 214) has towards the front side (20) a rib (38) projecting upwards, which is designed in such a way that it prevents a liquid trickling down on to the top edge (24, 124, 224) from flowing away towards the front side (20) of the cooling plate (14, 114, 214).3. Cooling plate according to claim 1 or 2, characterised in that the top edge (124, 224) of the cooling plate (114, 214) is designed as a collecting channel, which has an outlet towards the rear side (22) of the cooling plate (114, 214).4. Cooling plate according to claim 3, characterised in that the collecting channel has a slope towards the outlet.5. Cooling plate according to claim 3 or 4, characterised in that the collecting channel is sealed by a barrier in the two lateral edges of the cooling plate (114, 214) against lateral overflow.6. Cooling plate according to one of claims 1 to 5, characterised in that the cooling plate (14, 114, 214) is a solid copper block, in which at least one cooling duct (18) is arranged.P-PWU-4CE/WC !transiation of PCT/EP 99/080406 as pub.ished)7. Cooling plate according to claim 6, characterised in that at least one cooling duct (18) is arranged immediately below the top edge (24, 124, 224).8. Cooling plate according to one of claims 1 to 7, characterised in that the thickness of the cooling plate (14, 114, 214) in the area of the bottom edge (26, 226) is smaller than in the area of the top edge (24, 124, 224).9. Cooling plate according to claim 8, characterised in that the shape of the bottom edge (26, 226) is complementary to the shape of the top edge (24, 124, 224).10.Cooling device for an essentially vertical furnace wall comprising: a lower cooling device consisting of at least one cooling plate (14, 114, 214) according to one of claims 1 to 9; and an upper cooling device, which is arranged above the lower cooling device on the furnace wall and under which the top edge (24, 124, 224) of the cooling plate (14, 114, 214) of the lower cooling device extends in such a way that most of a cooling liquid trickling down from the upper cooling device is collected by this top edge (24, 124, 224) and diverted towards the rear side (22) of the cooling plate (14, 114, 214).11.Cooling device according to claim 10, characterised in that the upper cooling device comprises cooling tubes (16).12. Cooling device according to claim 10, characterised in that the upper cooling device comprises at least one upper cooling plate (214), which in each case forms a front side (20), a rear side (22), two lateral edges, a top edge (24, 124, 224) and a bottom edge (26, 226), the rear side (22) facing the furnace wall and the front side (20) the furnace interior, and the top edge (124) of a cooling plate (114) of the lower cooling device immediately below the upper cooling plate (214) extending under the bottom edge (226) of the latter.P-PWU-4C6/WC itranslaticn of PCT/EZP 99/08040¢ as pab ished: ® 1013. Cooling device according to claim 12, characterised in that the bottom edge (216) of a cooling plate (214) of the upper cooling device projects into the top edge (124, 224) designed as a collecting channel of a cooling plate (114) of the lower cooling device immediately below the upper cooling device.14. Cooling device according to claim 10, characterised in that the upper cooling device comprises several rows of cooling plates (14, 114, 214) according to one of claims 1 to 9, the top edges (24, 124, 224) of the cooling plates of a row immediately below extending under the bottom edges (26, 226) of the cooling plates in a row.15. Cooling device according to one of claims 10 to 14, characterised in that the top edges (124, 224) designed as collecting channels of the cooling plates (114, 214) have an outlet opening towards the rear side (22) of the cooling plates (114, 214), which lies opposite an opening (40) in a shell plate (12) of the furnace wall.16. Cooling device according to claim 15, characterised in that an outlet device (129, 229), which penetrates through the opening (40) in the shell plate (12) is assigned to the outlet opening.17. Cooling device according to claim 16, characterised in that the outlet device is formed by a fixing hook on the rear side (22) of the cooling plate, which is hooked into an opening in the shell plate.18. Cooling device according to claim 16 or 17, characterised in that a liquid detector is assigned to the outlet device.19. Cooling device according to one of claims 10 to 18, characterised in that the bottom edges (26) of the cooling plates (14, 114) of the lower cooling device are inserted in a retention basin, which is delimited from the furnace interior2-PWU-406/WC {translation of PCT/E? 99/08040€ as piblished; ® 11 (10) by a retention barrier (42) and the furnace exterior by a furnace shell plate (12), the latter having at least one outlet opening (44) for the retention basin.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU90313A LU90313B1 (en) | 1998-11-04 | 1998-11-04 | Cooling plate and cooling device for a vertical furnace wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA200103585B true ZA200103585B (en) | 2002-10-02 |
Family
ID=19731779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA200103585A ZA200103585B (en) | 1998-11-04 | 2001-05-03 | Cooling plate and cooling system for the vertical wall of an oven. |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1137814A1 (en) |
| JP (1) | JP2002528697A (en) |
| AU (1) | AU1378600A (en) |
| BR (1) | BR9915311A (en) |
| LU (1) | LU90313B1 (en) |
| TW (1) | TW473547B (en) |
| WO (1) | WO2000026419A1 (en) |
| ZA (1) | ZA200103585B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100456036B1 (en) * | 2002-01-08 | 2004-11-06 | 이호영 | Cooling panel for a shaft furnace |
| IT1403883B1 (en) * | 2010-08-06 | 2013-11-08 | Tenova Spa | FLUID-COOLED PANEL FOR METALLURGICAL OVENS, COOLING SYSTEM FOR METALLURGICAL OVENS INCLUDING SUCH PANEL AND METALLURGICAL OVEN INCORPORATING THE SAME |
| EP3480324B1 (en) * | 2017-11-03 | 2020-11-04 | Berry Metal Company | Modular furnace cooling wall |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1494406A (en) * | 1966-09-19 | 1967-09-08 | Didier Werke Ag | Device for protecting the refractory lining of shaft furnaces, in particular blast furnaces, against water leaks from cooling boxes, nozzles and the like |
| US5561685A (en) * | 1995-04-27 | 1996-10-01 | Ucar Carbon Technology Corporation | Modular spray cooled side-wall for electric arc furnaces |
-
1998
- 1998-11-04 LU LU90313A patent/LU90313B1/en active
-
1999
- 1999-02-11 TW TW088102233A patent/TW473547B/en active
- 1999-11-03 AU AU13786/00A patent/AU1378600A/en not_active Abandoned
- 1999-11-03 JP JP2000579791A patent/JP2002528697A/en active Pending
- 1999-11-03 BR BR9915311-4A patent/BR9915311A/en not_active Application Discontinuation
- 1999-11-03 EP EP99971469A patent/EP1137814A1/en not_active Withdrawn
- 1999-11-03 WO PCT/EP1999/008406 patent/WO2000026419A1/en not_active Application Discontinuation
-
2001
- 2001-05-03 ZA ZA200103585A patent/ZA200103585B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP1137814A1 (en) | 2001-10-04 |
| TW473547B (en) | 2002-01-21 |
| WO2000026419A1 (en) | 2000-05-11 |
| JP2002528697A (en) | 2002-09-03 |
| BR9915311A (en) | 2001-08-07 |
| AU1378600A (en) | 2000-05-22 |
| LU90313B1 (en) | 2000-07-18 |
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