GB2271630A - Panel adapted for coolant through-flow and an article incorporating such panels - Google Patents
Panel adapted for coolant through-flow and an article incorporating such panels Download PDFInfo
- Publication number
- GB2271630A GB2271630A GB9321368A GB9321368A GB2271630A GB 2271630 A GB2271630 A GB 2271630A GB 9321368 A GB9321368 A GB 9321368A GB 9321368 A GB9321368 A GB 9321368A GB 2271630 A GB2271630 A GB 2271630A
- Authority
- GB
- United Kingdom
- Prior art keywords
- panel
- tube
- tubes
- coolant
- flow
- 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.)
- Granted
Links
- 239000002826 coolant Substances 0.000 title claims abstract description 22
- 238000010891 electric arc Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims abstract description 4
- 239000002253 acid Substances 0.000 claims abstract description 3
- 238000005554 pickling Methods 0.000 claims abstract description 3
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005452 bending Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 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
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/0041—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for only one medium being tubes having parts touching each other or tubes assembled in panel form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0202—Header boxes having their inner space divided by partitions
- F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
- F28F9/0209—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only transversal partitions
- F28F9/0212—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only transversal partitions the partitions being separate elements attached to header boxes
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
A panel (1) adapted for the flow of coolant therethrough, comprising a plurality of lengths of circular section tubes (2) disposed in parallel relationship, either stacked one on top of the other or side-by-side, and adapted to constitute a zig-zag flow path for the liquid coolant. Opposite ends of the or each adjacent pair of tubes (2) are open for fluid flow communication into a transversely extending length of rolled hollow section (3) forming a coolant return chamber (10). The hollow section (3) has a first aperture into, or against, which one tube end is fitted for coolant flow into the chamber, and a second aperture into, or against, which an adjacent end of an adjacent tube is fitted for coolant flow from the chamber (10). The panel may be used in a furnace, kiln, ladle or a tank. The furnace may be an electric arc furnace and the tank may be an acid or pickling bath. <IMAGE>
Description
PANEL ADAPTED FOR COOLANT THROUGH-FLOW AND AN ARTICLE
INCORPORATING SUCH PANELS
This invention relates to a panel adapted for the flow therethrough of a coolant such as air or water, and to an article, such as an electric arc furnace or cooling tank, incorporating such panels.
Such a panel may be used for instance, to define an interior wall of a furnace, e.g. an electric arc furnace, as a replacement, in part, for relatively expensive refractory material. Alternatively, such a panel could be used as, or to form part of, a furance door or roof, but irrespective of its particular use, the purpose of the furnace panel is to form a barrier between a hot zone within a furnace and an ambient cooler zone, with the coolant prolonging the service life of the panel. Alternatively, the panel may be employed to cool a liquid or gaseous medium such as hot oil or hot air, e.g. by immersing the panel in the hot oil etc., or by constructing an oil tank from a number of such panels.
For furnace use, known panels are generally rectangular if they are intended to constitute a door or a portion of a furnace wall, or are segmental if they are to constitute a portion of the roof of a circular, electrical arc furnace. However, irrespective of the overall panel shape, one panel construction currently in use comprises sinuously arrayed, circular section water flow tubing extending over the entire area of the panel. The tubing thus comprises a plurality of parallel horizontally extending tube portions closely spaced with respect to one another and welded one above the other (insofar as a furnace door or wall portion is concerned) between the bottom and top of the panel, with the horizontal tube portions approximating in length to the width of the panel, and with 1800 return bends at the ends of the horizontal tube portions.As tube of requisite cross-section and wall thickness is available from manufacturers in finite lengths < 6m, it follows that sinuous tubing of say 40m total length must incorporate a number of butt joints e.g., 6 to 8 joints (even when using 6m long tubes) between adjacent tube ends. The butt joints are normally disposed down the centre of the panel, and, to form electric furnace walls, the panels subsequently need to be bent to arcuate shape but such bending disadvantageously stresses these butt joints which often results in premature failure or water leakage at these joints.
An inlet pipe is of course required to convey cooling water to an inlet end of the sinuous tubing, and an outlet pipe to convey water from an outlet end of the sinuous tubing. Apart from having a disadvantageously short service life, such furnace panels are expensive to fabricate in that, because of the use of circular section tubing, specially profiled in-fill pieces must be employed between adjacent external peripheries of adjacent horizontal tube lengths, with two adjacent horizontal tube portions welded to opposite edges of a common in-fill piece, while furthermore, differential expansion and contraction between horizontal tube portions and in-fill pieces frequently results in unsatisfactory welds. Equipment is also required to provide the 1800 return bends between one horizontal tube portion and the adjacent horizontal tube portion.
According to the present invention there is provided a panel adapted for the flow of coolant therethrough, comprising a plurality of lengths of circular section tube disposed in parallel relationship, either stacked one on top of the other or side-by-side, and adapted to constitute a zig-zag flow path for the liquid coolant, with opposite ends of the or each adjacent pair of tubes being open for fluid flow communication into a transversely extending length of rolled hollow section forming a coolant return chamber and having a first aperture into, or against, which one tube end is fitted for coolant flow into the chamber, and a second aperture into, or against, which an adjacent end of an adjacent tube is fitted for coolant flow from the chamber.
Thus, the - 'U shaped or 1800 return bend of conventional tubular panels, is replaced by a hollow section return end, with the attendant advantages not only of avoiding the need for an awkward bending operation, but also, particularly if the panel is metallic, considerably simplifying the welding involved and hence ensuring integrity of the welding to avoid both coolant leakage and premature failure.
-In its simplest form the panel could comprise two parallel tubes, but a practical panel would probably include 6-12 or more tubes. Whilst individual hollow section return ends could be provided, preferably, manufacture is simplified and the integrity and strength of the resulting panel is improved if in accordance with a preferred feature, an integral length of rolled hollow section extends the full length (or height) of the panel, spanning the ends of all the tubes, which only needs the insertion and securing by welding of an appropriate number of internal separator plates to define a chamber common to a pair of adjacent tubes. Thus for a panel comprising eight tubes, an inner face of the hollow box section would require eight circular holes on appropriate centres, three internal partitions, and top and bottom closure plates.
Thus, a panel conveniently comprises a plurality of lengths of circular section tube, all of the same length, a pair of parallel, hollow (box) section end pieces extending transversely of the tubes across each opposite end, to define a generally rectangular panel.
It is of-course necessary to convey coolant to one end tube and from the opposite end tube with, in the case of parallel horizontal tubes, one end tube being the bottom tube and the opposite end tube being the top tube. Such conveyance is conveniently by a second rolled hollow section cool and supply pipe welded to, and extending down one side of, the panel with an outlet aperture into one end of e.g. the lowermost tube. In detail, the supply pipe may be welded to one of the rolled hollow sections providing the return chambers.
Obviously, standard welding techniques such as providing preparatory weld metal around a pipe end and the ready ability to cut window squares into (e.g. outer) faces of the rolled hollow sections to render easy the welding of the tube end internally of the rolled hollow section, inspection and any swarf or other debris removal before welding the window square back into position, should be employed.
Another aspect of the invention includes an article, such as, an electric arc furnace or item of metallurgical or non-metallurgical equipment, such as a ladle, kiln, tank etc., constructed from, or incorporating, at least one panel in accordance with the invention. The panel can be constructed in any material suitable for the intended use. Thus, for use in an electric arc furnace, the panel may be of carbon steel, e.g. 43C. Alternatively, other metallic constructions may be of stainless steel, or titanium, depending on the corrosion to be counteracted. Furthermore, the panel may be constructed in non-metallic materials, e.g. synthetic plastics materials such as polyurethane or polypropylene if for instance an acid bath or pickling bath is involved.
One example of panel in. accordance with the invention will now be described in greater detail, with reference to the accompanying drawings, in which:
Figure 1 is a perspective view of approximately one half of a panel, the other half corresponding; and
Figure 2 is a sectional view through Figure 1.
In the drawings, a panel 1 is intended to form a component - such as a wall, door or roof - of an electric arc furnace.
The panel 1 comprises eight parallel and horizontally extending lengths of tube 2 stacked one on top of the other, typically of 43C carbon steel, and welded together along mutually abutting surfaces. Together, the tubes 2 provide a zig-zag flow path F for liquid coolant, typically water, pumped through the tubes 2 from the lowermost tube 2A and exiting at the uppermost tube 2B. Return ends to turn the flow through 1800 are provided by an integral length of transversely extending, rolled hollow box section 3. An inner face 4 of the hollow section 3 is provided with eight circular holes 5 into which opposite ends 6 of the tubes 2, which ends 6 are open for fluid flow communication into the rolled hollow box section 3 and are fitted and welded in place.
As can be seen from Figure 2, the hollow section 3 is provided with three internal partition plates 7, and top and bottom closure plates 8, 9, to form four return chambers 10 within the hollow section 3.
Claims (13)
1. A panel adapted for the flow of coolant therethrough, comprising a plurality of lengths of circular section tube disposed in parallel relationship, either stacked one on top of the other or side-by-side, and adapted to constitute a zig-zag flow path for the liquid coolant, with opposite ends of the or each adjacent pair of tubes being open for fluid flow communication into a transversely extending length of rolled hollow section forming a coolant return chamber and having a first aperture into, or against, which one tube end is fitted for coolant flow into the chamber, and a second aperture into, or against, which an adjacent end of an adjacent tube is fitted for coolant flow from the chamber.
2. A panel as claimed in Claim 1, comprising two parallel tubes.
3. A panel as claimed in Claim 1, comprising 6 - 12 or more parallel tubes.
4. A panel as claimed in any preceding Claim, comprising an individual, rolled hollow section, constituting a return end for two parallel, adjacent tubes is provided at each end of the panel.
5. A panel as claimed in any one of Claims 1 to 3, wherein an integral length of rolled hollow section extends the full length (or height) of the panel, spanning the ends of all the tubes, is provided at each end of the panel, with internal separator plates inserted into each integral length and welded in place to define a chamber common to a pair of adjacent tubes.
6. A panel as claimed in Claim 5, for an embodiment with eight tubes, wherein an inner face of the hollow box section is provided with eight circular holes on appropriate centres, three internal partitions, and top and bottom closure plates.
7. A panel as- claimed in any preceding Claim, comprising a plurality of lengths of circular section tube, all of the same length, a pair of parallel, hollow (box) section end pieces extending transversely of the tubes across each opposite end, to define a generally rectangular panel.
8. A panel as claimed in any preceding Claim, comprising a plurality of parallel horizontal tubes, one end tube being the bottom tube and the opposite end tube being the top tube, with a second rolled hollow section cool and supply pipe welded to, and extending down one side of, the panel with an outlet aperture into one end of, e.g. the lowermost tube.
9. A panel as claimed in Claim 8, wherein the cool and supply pipe is welded to one of the rolled hollow sections providing the return chambers.
10. A panel substantially as hereinbefore described with reference to the accompanying drawings.
11. An article, such as, an electric arc furnace or item of metallurgical or non-metallurgical equipment, such as a ladle, kiln, tank etc., constructed from, or incorporating, at least one panel in accordance with any preceding Claim.
12. An electric arc furnace, constructed from, or incorporating at least one panel as defined in any one of
Claims 1 - 10, the panel(s) being of 43C carbon steel.
13. A tank to- form an acid or pickling bath constructed from, or incorporating at least one panel as defined in any one of Claims 1 - 10, the panel(s) being of non-metallic material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB929221927A GB9221927D0 (en) | 1992-10-17 | 1992-10-17 | Panel adapted for coolant through-flow and an article incorporating such panels |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9321368D0 GB9321368D0 (en) | 1993-12-08 |
| GB2271630A true GB2271630A (en) | 1994-04-20 |
| GB2271630B GB2271630B (en) | 1996-06-12 |
Family
ID=10723684
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB929221927A Pending GB9221927D0 (en) | 1992-10-17 | 1992-10-17 | Panel adapted for coolant through-flow and an article incorporating such panels |
| GB9321368A Expired - Fee Related GB2271630B (en) | 1992-10-17 | 1993-10-15 | Panel adapted for coolant through-flow and an article incorporating such panels |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB929221927A Pending GB9221927D0 (en) | 1992-10-17 | 1992-10-17 | Panel adapted for coolant through-flow and an article incorporating such panels |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB9221927D0 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6729389B2 (en) | 2000-02-24 | 2004-05-04 | Sts Corporation | Heat transfer apparatus with zigzag passage |
| WO2013160954A1 (en) * | 2012-04-26 | 2013-10-31 | 三菱電機株式会社 | Heat exchanger, and refrigerating cycle device equipped with heat exchanger |
| EP3220093A4 (en) * | 2014-11-14 | 2018-10-10 | Daikin Industries, Ltd. | Heat exchanger |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB208158A (en) * | 1922-07-01 | 1924-09-24 | John Everett Bell | Improved apparatus for generating steam |
| GB504844A (en) * | 1937-11-18 | 1939-05-02 | Mather & Platt Ltd | Improvements relating to air heaters |
| GB844660A (en) * | 1958-04-03 | 1960-08-17 | Ferguson Superheaters Ltd | Improvements in and relating to heat exchangers |
| EP0501444A2 (en) * | 1991-02-26 | 1992-09-02 | Zehnder-Beutler GmbH | Radiator |
-
1992
- 1992-10-17 GB GB929221927A patent/GB9221927D0/en active Pending
-
1993
- 1993-10-15 GB GB9321368A patent/GB2271630B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB208158A (en) * | 1922-07-01 | 1924-09-24 | John Everett Bell | Improved apparatus for generating steam |
| GB504844A (en) * | 1937-11-18 | 1939-05-02 | Mather & Platt Ltd | Improvements relating to air heaters |
| GB844660A (en) * | 1958-04-03 | 1960-08-17 | Ferguson Superheaters Ltd | Improvements in and relating to heat exchangers |
| EP0501444A2 (en) * | 1991-02-26 | 1992-09-02 | Zehnder-Beutler GmbH | Radiator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6729389B2 (en) | 2000-02-24 | 2004-05-04 | Sts Corporation | Heat transfer apparatus with zigzag passage |
| WO2013160954A1 (en) * | 2012-04-26 | 2013-10-31 | 三菱電機株式会社 | Heat exchanger, and refrigerating cycle device equipped with heat exchanger |
| EP3220093A4 (en) * | 2014-11-14 | 2018-10-10 | Daikin Industries, Ltd. | Heat exchanger |
| US10465924B2 (en) | 2014-11-14 | 2019-11-05 | Daikin Industries, Ltd. | Heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2271630B (en) | 1996-06-12 |
| GB9221927D0 (en) | 1992-12-02 |
| GB9321368D0 (en) | 1993-12-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20061015 |