EP1842932A1 - Method for cooling tubes - Google Patents
Method for cooling tubes Download PDFInfo
- Publication number
- EP1842932A1 EP1842932A1 EP06007311A EP06007311A EP1842932A1 EP 1842932 A1 EP1842932 A1 EP 1842932A1 EP 06007311 A EP06007311 A EP 06007311A EP 06007311 A EP06007311 A EP 06007311A EP 1842932 A1 EP1842932 A1 EP 1842932A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- heat exchange
- cold
- cooling
- liquefied
- 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- Withdrawn
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 112
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 238000007664 blowing Methods 0.000 claims description 21
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 2
- 239000007792 gaseous phase Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
Definitions
- the liquefied gas is brought into indirect heat exchange with the object.
- the liquefied gas flows through heat exchange passages which are arranged close to the passageway where the object is placed into or passed through.
- heat exchange passages which are arranged close to the passageway where the object is placed into or passed through.
- the cold gas is blown onto the object to directly exchange heat with the object.
- the inventive method the cold of a liquefied gas is highly efficiently utilized.
- Figure 2 shows another arrangement of the gas blowing device 5 and the spiral pipeline 3.
- the gas blowing device 5 as well as the spiral pipeline 3 are in principle of the same design as shown in figure 1. However, the gas blowing device 5 is disposed within in the center part of the spiral pipeline 3.
Abstract
Description
- The invention relates to a method for cooling an object, in particular a metal wire or a metal tube, wherein a jet of a cold gas is blown onto said object. Further the invention is related to a device for cooling an object comprising a passage way for said object and a gas blowing device with gas outlets for directing a cold gas to said passage way.
- Pending German Patent
Application Number DE 10 2004 054 627 (not yet published) discloses a device for cooling long objects, for example tubes, by blowing cold gas onto the object. The device comprises a first chamber with a plurality of nozzles for blowing out cold gas jets. Further, an enveloping tube is provided which envelopes the object. The cold gas blown out of the first chamber flows between the object and the enveloping tube and thereby additionally cools down the object. - The device disclosed in the above-mentioned German Patent Application shows a good heat contact between the cold gas and the object. However, to enhance the heat transfer coefficient the warmed gas should be removed as fast as possible from the object to be cooled. Otherwise it will form an insulating gas buffer.
- Therefore, it is an object of the present invention, to provide an improved method and an improved device for cooling an object by blowing gas jets onto it.
- This object is achieved by method for cooling an object, in particular a metal wire or a metal tube, wherein a jet of a cold gas is blown onto said object, which is characterized in that said object is cooled in indirect heat exchange with a liquefied gas, said liquefied gas is then evaporated to produce said cold gas and said cold gas is blown onto said object.
- The inventive device for cooling an object comprises a passage way for said object and a gas blowing device with gas outlets for directing a cold gas to said passage way wherein a heat exchange passage for a liquefied gas and means for evaporating said liquefied gas in order to produce a cold gas are provided, wherein said heat exchange passage for said liquified gas is in heat exchange contact with said passage way for said object.
- According to the invention the cold of a liquefied gas is utilized to cool the object in two steps:
- First, the liquefied gas is brought into indirect heat exchange with the object. The liquefied gas flows through heat exchange passages which are arranged close to the passageway where the object is placed into or passed through. By convection of the atmosphere surrounding the object heat is transferred to the liquefied gas. In addition, especially when cooling hot objects with a temperature above 500 °C there is a substantial temperature difference between the hot object and the liquefied gas. Thus, part of the heat is transferred to the liquefied gas by radiation.
- Then the liquefied gas is evaporated to produce a cold gas. Part of the liquefied gas might already have been evaporated during the indirect heat exchange of a liquefied gas with the object.
- Finally, the cold gas is blown onto the object to directly exchange heat with the object. By the inventive method the cold of a liquefied gas is highly efficiently utilized.
- Preferably, liquid nitrogen is used as liquefied gas.
- According to a preferred embodiment of the invention said heat exchange passages for the liquified gas are arranged around said gas blowing device. By that arrangement the indirect cooling by the liquified gas and the direct cooling by means of jets of cold gas is carried out at the same place. The space for cooling the object, for example the metal tube, is thus minimized.
- The liquified gas is passed through heat exchange passages to indirectly cool the object. Preferably these heat exchange passages are designed as a spiral winded around the passageway where the object to be cooled is passed through. More preferably the spiral pipeline for the liquified gas is winded around the gas blowing device.
- After having indirectly cooled the object the liquified gas is transferred to an evaporator where the liquified gas is evaporated, for example in indirect heat exchange with air or water. The resulting cold gas is fed to the gas blowing device, blown out through gas outlets and directed to the object. Preferably the gas blowing device also comprises gas inlets arranged close to the passageway for the object. Gas which has been warmed up in heat exchange with the hot object can be withdrawn very quickly by means of these gas inlets. Thus, the heat transfer coefficient is essentially improved. It is preferred to utilize a fan or a similar device to suck in warm gas from the passageway into the gas inlets.
- The invention is preferably suitable for cooling metal objects, such as tubes, wires or sheets, after a heat treatment. The inventive device can be placed in-line with the heat treatment process.
- The invention as well as further details of the invention shall now be described with reference to the accompanying drawings.
- Figure 1 shows an inventive device for cooling hot metal tubes.
- Figure 2 shows an alternative arrangement of the inventive gas cooling device.
- Figure 3 shows another embodiment of the gas blowing device.
- Figure 1 illustrates the principle of the invention. The inventive method is preferably be used for cooling
hot metal tubes 1 after a heat treatment process when they have a temperature of approximately 1000 °C. - From a
storage tank 2 liquid nitrogen is transferred to aspiral pipeline 3. In the center of thespiral pipeline 3 there is a passage way where thehot tube 1 is transported through.Tube 1 is thus in indirect heat exchange with the liquid nitrogen. - There are two heat transfer mechanisms active: First, heat is transferred from the
tube 1 to thespiral pipeline 3 by convection of the surrounding atmosphere. Second, due to the large temperature difference thespiral pipeline 3 andtube 1 there is a significant heat transfer by radiation. - After leaving
spiral pipeline 3 the nitrogen partly evaporated, partly still in liquid phase, flows to anevaporator 4. Inevaporator 4 the nitrogen is completely transferred into the gaseous phase. The resulting nitrogen gas is fed to a gas blowingdevice 5 viapipeline 6. There, the gas is distributed toseveral gas outlets 7 which are arranged around the passage way fortube 1. The nitrogen gas is blown out of thegas outlets 7 and directed totube 1. -
Gas outlets 7 are alternately disposed withgas inlets 8. The nitrogen which has been warmed up bytube 1 is sucked into thegas inlets 8 and withdrawn throughline 9. - Figure 2 shows another arrangement of the gas blowing
device 5 and thespiral pipeline 3. The gas blowingdevice 5 as well as thespiral pipeline 3 are in principle of the same design as shown in figure 1. However, the gas blowingdevice 5 is disposed within in the center part of thespiral pipeline 3. - The advantage of the arrangement according to figure 2 is that cooling is achieved within a shorter length and that the nitrogen gas blown out of
gas outlets 7 is also cooled by the liquid nitrogen flowing inspiral pipeline 3. Further, the forced flow of the nitrogen gas out ofgas outlets 7 and intogas inlets 8 also enhances the convective heat transfer tospiral pipeline 3. On the other hand, the radiative heat transfer is reduced since part of thespiral pipeline 3 is in the shape of the gas blowingdevice 5. - Figure 3 illustrates another embodiment of the inventive gas blowing device especially designed for cooling of wires. For sake of simplicity, the
spiral pipeline 3 is not shown in this figure. Thespiral pipeline 3 may be arranged as shown in figure 1 or in figure 2.Gas feed pipeline 6 for feeding the evaporated nitrogen gas to thegas outlets pipeline 9 for withdrawing the warm nitrogen gas are also not shown in figure 3. - The gas blowing device comprises two
wind boxes wire 1. Bothwind boxes gas outlets gas inlets gas outlets 12 and thegas inlets 13 ofwind box 10 are arranged alternately. The same applies forwind box 11. In addition,gas outlets 12 andgas outlets 14 ofwind boxes opposite gas outlet 12 ofwind box 10 there isgas inlet 15 ofwind box 11. Thus, the cold gas is blown out ofgas outlet 12, flows aroundwire 1 is sucked intogas inlet 15. And gas which is directed towire 1 via agas outlet 14 ofwind box 11 is withdrawn through thatgas inlet 13 ofwind box 10 which is positioned directly opposite togas outlet 14.
Claims (7)
- Method for cooling an object (1), in particular a metal wire or a metal tube, wherein a jet of a cold gas is blown onto said object (1), characterized in that said object (1) is cooled in indirect heat exchange (3) with a liquefied gas (2), said liquefied gas is then evaporated (4) to produce said cold gas and said cold gas is blown (5) onto said object (1).
- Method according to claim 1 characterized in that liquid nitrogen is used as liquefied gas (2).
- Device for cooling an object (1) comprising a passage way for said object (1) and a gas blowing device (5) with gas outlets (7) for directing a cold gas to said passage way, characterized in that a heat exchange passage (3) for a liquefied gas and means (4) for evaporating said liquefied gas in order to produce a cold gas are provided, wherein said heat exchange passage (3) for said liquified gas is in heat exchange contact with said passage way for said object (1).
- Device according to claim 3 characterized in that said heat exchange passage (3) for said liquified gas is arranged around said gas blowing device (5).
- Device according to any of claims 3 or 4 characterized in that said heat exchange passage (3) for said liquified gas is designed as a spiral winded around said gas blowing device (5).
- Device according to any of claims 3 to 4 characterized in that said gas blowing device (5) comprises gas inlets (8) directed to said passage way.
- Device according to claim 6 characterized in that said gas inlets (8) and said gas outlets (7) are disposed on two opposite sides of said passage way and that each of said gas inlets (8) is positioned opposite one of said gas outlets (7).
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06007311A EP1842932A1 (en) | 2006-04-06 | 2006-04-06 | Method for cooling tubes |
US11/697,247 US20070256441A1 (en) | 2006-04-06 | 2007-04-05 | Method and device for cooling tubes |
RU2007112689/06A RU2007112689A (en) | 2006-04-06 | 2007-04-05 | PIPE COOLING METHOD |
BRPI0701595-0A BRPI0701595A (en) | 2006-04-06 | 2007-04-05 | method for cooling pipes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06007311A EP1842932A1 (en) | 2006-04-06 | 2006-04-06 | Method for cooling tubes |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1842932A1 true EP1842932A1 (en) | 2007-10-10 |
Family
ID=36579428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06007311A Withdrawn EP1842932A1 (en) | 2006-04-06 | 2006-04-06 | Method for cooling tubes |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070256441A1 (en) |
EP (1) | EP1842932A1 (en) |
BR (1) | BRPI0701595A (en) |
RU (1) | RU2007112689A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006012985A1 (en) * | 2006-03-21 | 2007-10-11 | Linde Ag | Method and device for rapid cooling of workpieces |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1393378A (en) * | 1964-01-24 | 1965-03-26 | Minikay A G | Insulated cold storage rooms or similar enclosures |
US3385073A (en) * | 1966-10-06 | 1968-05-28 | Cryo Therm Inc | Refrigeration system for shipping perishable commodities |
SU985688A1 (en) * | 1980-10-27 | 1982-12-30 | Одесский Технологический Институт Холодильной Промышленности | Contact heat exchanger |
EP0576134A1 (en) * | 1992-06-10 | 1993-12-29 | The Boc Group, Inc. | Cooling method and apparatus |
RU2025558C1 (en) * | 1991-08-28 | 1994-12-30 | Малое внедренческое научно-техническое предприятие "Метеор" | Fog-dispersal apparatus |
JPH09196528A (en) * | 1996-01-11 | 1997-07-31 | Horiba Ltd | Heat exchanger for high-efficiency cooling |
WO2003029720A1 (en) * | 2001-10-02 | 2003-04-10 | Thermo King Corporation | Cryogenic temperature control system |
EP1621829A1 (en) * | 2004-07-27 | 2006-02-01 | Linde Aktiengesellschaft | Truck cooling system |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2248909A (en) * | 1940-04-08 | 1941-07-08 | Foote Mineral Co | Heat transfer device |
US2487821A (en) * | 1944-06-10 | 1949-11-15 | Linde Air Prod Co | Method of and apparatus for cooling and dispensing objects |
US3382681A (en) * | 1964-11-12 | 1968-05-14 | Melville G Hunter | Stabber cooling device |
US3494140A (en) * | 1967-10-17 | 1970-02-10 | Integral Process Syst Inc | Liquid nitrogen flash freezing |
FR2034754A6 (en) * | 1968-03-06 | 1970-12-18 | Mille Gaston | |
BE748164A (en) * | 1969-04-03 | 1970-08-31 | Heye Hermann Fa | PROCESS FOR INFLUENCING THE TEMPERATURE OF MELTED GLASS BETWEEN THE VITRIFICATION TANK AND THE DROP OUTLET RING OF A FEEDING DEVICE |
US3611745A (en) * | 1969-11-24 | 1971-10-12 | Ralph Hamill | Freezing system |
US4017284A (en) * | 1973-05-14 | 1977-04-12 | Cryox Corporation | Air distillation apparatus comprising regenerator means for producing oxygen |
SE380125B (en) * | 1974-12-02 | 1975-10-27 | Ericsson Telefon Ab L M | |
DE2547521A1 (en) * | 1975-10-23 | 1977-04-28 | Linde Ag | DEVICE FOR COOLING OBJECTS |
US4137723A (en) * | 1977-09-07 | 1979-02-06 | Lewis Tyree Jr | Direct contact CO2 cooling |
US5083436A (en) * | 1990-06-14 | 1992-01-28 | Vacuum Barrier Corporation | Workpiece chilling and shrinking |
US5329779A (en) * | 1993-02-09 | 1994-07-19 | C.V.G. Siderurgica Del Orinoco, C.A. | Method and apparatus for cooling workpieces |
DE102006012985A1 (en) * | 2006-03-21 | 2007-10-11 | Linde Ag | Method and device for rapid cooling of workpieces |
-
2006
- 2006-04-06 EP EP06007311A patent/EP1842932A1/en not_active Withdrawn
-
2007
- 2007-04-05 RU RU2007112689/06A patent/RU2007112689A/en not_active Application Discontinuation
- 2007-04-05 US US11/697,247 patent/US20070256441A1/en not_active Abandoned
- 2007-04-05 BR BRPI0701595-0A patent/BRPI0701595A/en not_active Application Discontinuation
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1393378A (en) * | 1964-01-24 | 1965-03-26 | Minikay A G | Insulated cold storage rooms or similar enclosures |
US3385073A (en) * | 1966-10-06 | 1968-05-28 | Cryo Therm Inc | Refrigeration system for shipping perishable commodities |
SU985688A1 (en) * | 1980-10-27 | 1982-12-30 | Одесский Технологический Институт Холодильной Промышленности | Contact heat exchanger |
RU2025558C1 (en) * | 1991-08-28 | 1994-12-30 | Малое внедренческое научно-техническое предприятие "Метеор" | Fog-dispersal apparatus |
EP0576134A1 (en) * | 1992-06-10 | 1993-12-29 | The Boc Group, Inc. | Cooling method and apparatus |
JPH09196528A (en) * | 1996-01-11 | 1997-07-31 | Horiba Ltd | Heat exchanger for high-efficiency cooling |
WO2003029720A1 (en) * | 2001-10-02 | 2003-04-10 | Thermo King Corporation | Cryogenic temperature control system |
EP1621829A1 (en) * | 2004-07-27 | 2006-02-01 | Linde Aktiengesellschaft | Truck cooling system |
Non-Patent Citations (3)
Title |
---|
DATABASE WPI Section Ch Week 198344, Derwent World Patents Index; Class J08, AN 1983-806463, XP002386743 * |
DATABASE WPI Section PQ Week 199531, Derwent World Patents Index; Class Q41, AN 1995-239105, XP002386742 * |
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 11 28 November 1997 (1997-11-28) * |
Also Published As
Publication number | Publication date |
---|---|
RU2007112689A (en) | 2008-10-10 |
BRPI0701595A (en) | 2008-07-15 |
US20070256441A1 (en) | 2007-11-08 |
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Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
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AX | Request for extension of the european patent |
Extension state: AL BA HR MK YU |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LINDE AKTIENGESELLSCHAFT |
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17P | Request for examination filed |
Effective date: 20071106 |
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17Q | First examination report despatched |
Effective date: 20080130 |
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AKX | Designation fees paid |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LINDE AG |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20091103 |