EP2719464A1 - Cryogenic nozzle and corresponding method - Google Patents

Cryogenic nozzle and corresponding method Download PDF

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Publication number
EP2719464A1
EP2719464A1 EP13004835.8A EP13004835A EP2719464A1 EP 2719464 A1 EP2719464 A1 EP 2719464A1 EP 13004835 A EP13004835 A EP 13004835A EP 2719464 A1 EP2719464 A1 EP 2719464A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
cryogenic
fluid
channel
cooling
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
Application number
EP13004835.8A
Other languages
German (de)
French (fr)
Other versions
EP2719464B1 (en
Inventor
Volker Kamm
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.)
Linde GmbH
Original Assignee
Linde GmbH
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Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Priority to EP13004835.8A priority Critical patent/EP2719464B1/en
Publication of EP2719464A1 publication Critical patent/EP2719464A1/en
Application granted granted Critical
Publication of EP2719464B1 publication Critical patent/EP2719464B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/24—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means incorporating means for heating the liquid or other fluent material, e.g. electrically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/002—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour incorporating means for heating or cooling, e.g. the material to be sprayed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/02—Skids or tracks for heavy objects
    • F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001—Aluminium or its alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1245—Accessories for subsequent treating or working cast stock in situ for cooling using specific cooling agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1246—Nozzles; Spray heads

Definitions

  • the present invention relates to a cryogenic nozzle and to a method for ejecting a cryogenic fluid by means of such a cryogenic nozzle.
  • cryogenic fluid also referred to as cryogenic gases
  • cryogenic fluid is ejected from a cryogenic nozzle, wherein an object to be cooled is positioned directly in front of the nozzle opening.
  • cryogenic fluid through the cryogenic nozzle is expediently interrupted.
  • an interruption for example a machining or processing of the object positioned in front of the nozzle opening can be performed.
  • prior art nozzles can not immediately provide cryogenic fluid in the liquid state, which is necessary for cooling the object. Rather, as the nozzle acquires a higher temperature during said interruption of the flow of cryogenic fluid, an evaporation of cryogenic fluid will initially occur, which will lead to significant delays in the further processing of the object.
  • cryogenic cooling applications are Al-rolling applications.
  • the object of the invention is to minimize delays during processing of objects, which, intermittently or continuously, are cooled by means of direct cryogenic cooling.
  • a cryogenic valve comprising the features of claim 1.
  • the inventive method for ejecting a cryogenic fluid by means of such a cryogenic nozzle is characterized in that a cooling medium is passed through at least one fluid channel of said cryogenic nozzle.
  • the at least one fluid channel provided in the nozzle body can be used to transport or circulate a cooling fluid through the nozzle body, thus ensuring that the nozzle can be kept sufficiently cold at all times, even during times at which cooling of an object by means of ejection of cryogenic fluid through the nozzle orifices is interrupted.
  • a cryogenic nozzle can at all times be held in a standby state, without an actual cryogenic fluid having to be ejected by the nozzle.
  • a cryogenic nozzle according to the invention it can be ensured that a desired cryogenic cooling can instantly be provided, as soon as cryogenic fluid is ejected from the nozzle.
  • the supply channel can be brought into fluid communication with the at least one cooling channel.
  • the same cryogenic fluid for cooling an object (by means of ejection through nozzle orifices) and for cooling the nozzle body.
  • cryogenic fluid entering the nozzle volume via the supply channel can be directed into the at least one cooling channel, especially during times at which an ejection of cryogenic fluid through nozzle orifices is interrupted. This measure enables a particularly efficient usage of cryogenic fluid.
  • control means for directing cryogenic fluid supplied through the supply channel into the nozzle volume and/or the cooling channels.
  • the inventive cryognic nozzle is in particular suited for spraying or ejecting liquid nitrogen.
  • a gaseous medium is used as heating fluid.
  • Preferred heating media are in particular inert gases, such as gaseous nitrogen.
  • Figure 1 shows a first preferred embodiment of a cryogenic nozzle according to the invention, used for direct cryogenic cooling of an object in a schematic side view.
  • a preferred embodiment of a cryogenic nozzle according to the invention is generally designated 100. It is used for direct cryogenic cooling of an object 200, for example for cooling a roll for rolling aluminium sheets.
  • the cryogenic nozzle 100 comprises a nozzle body 110 defining a nozzle volume 120 and at least one nozzle orifice 122.
  • a supply channel for supplying a cryogenic fluid, for example liquid nitrogen (LIN), to the nozzle volume 120 is designated 114.
  • LIN liquid nitrogen
  • Cryogenic fluid entering the nozzle volume 120 through supply channel 114 is ejected through at least one nozzle orifice 122. After exiting the at least one nozzle orifice 122, the cryogenic fluid impinges on object 200, thus providing an effective direct cryogenic cooling.
  • Nozzle body 110 is further provided with cooling channels 124, through which a cryogenic fluid can be transported or circulated.
  • the cryogenic fluid flowing through cooling channels 124 can be the same fluid as provided through supply channel 114 for cooling object 200. Also, it can be provided as a different cryogenic fluid. It is possible to provide cryogenic fluid for cooling channels 124 via supply channel 114. Also a separate supply for providing cooling channels 124 with cryogenic fluid is possible.
  • an effective cooling of cryogenic nozzle 100 can be effected during times at which cooling of body 200 (i.e. passage of cryogenic fluid through nozzle orifices 122) is interrupted.
  • cooling of body 200 i.e. passage of cryogenic fluid through nozzle orifices 122
  • delays in cooling of the object 200 after resumption of direct cooling by ejecting cryogenic fluid through orifices 122 can be minimized.
  • an initial evaporation of cryogenic fluid due to a warming up of the nozzle body during interruption of actual cooling had to be taken into account.
  • Cooling channels 124 can also be used to heat up the cryogenic nozzle 100, for example for maintenance operation. In that case a heating fluid, especially warm nitrogen gas, is passed through the cooling channels 124 after the flow of cryogenic fluid through the nozzle orifices 122 has been stopped. Thereby the down-time for maintenance or repair of the cryogenic nozzle 100 will be reduced.
  • a heating fluid especially warm nitrogen gas

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)

Abstract

The invention relates to a cryogenic nozzle comprising a nozzle body (110) defining a nozzle volume (120), a supply channel (114) for supplying cryogenic fluid to the nozzle volume (120), and at least one nozzle orifice (122) for ejecting cryogenic fluid, from the nozzle volume (120), wherein the nozzle body (110) is provided with at least one fluid channel (124).

Description

  • The present invention relates to a cryogenic nozzle and to a method for ejecting a cryogenic fluid by means of such a cryogenic nozzle.
  • For numerous applications, direct cooling using cryogenic fluids (also referred to as cryogenic gases) is advantageous. Herein, cryogenic fluid is ejected from a cryogenic nozzle, wherein an object to be cooled is positioned directly in front of the nozzle opening.
  • During phases, in which an object need not be cooled, the flow of cryogenic fluid through the cryogenic nozzle is expediently interrupted. During such an interruption, for example a machining or processing of the object positioned in front of the nozzle opening can be performed.
  • If, subsequently, a further cooling of the object is necessary, prior art nozzles can not immediately provide cryogenic fluid in the liquid state, which is necessary for cooling the object. Rather, as the nozzle acquires a higher temperature during said interruption of the flow of cryogenic fluid, an evaporation of cryogenic fluid will initially occur, which will lead to significant delays in the further processing of the object.
  • Typical examples of such cryogenic cooling applications are Al-rolling applications.
  • The object of the invention is to minimize delays during processing of objects, which, intermittently or continuously, are cooled by means of direct cryogenic cooling.
  • This object is solved with a cryogenic valve comprising the features of claim 1. The inventive method for ejecting a cryogenic fluid by means of such a cryogenic nozzle is characterized in that a cooling medium is passed through at least one fluid channel of said cryogenic nozzle.
  • According to the invention, the at least one fluid channel provided in the nozzle body can be used to transport or circulate a cooling fluid through the nozzle body, thus ensuring that the nozzle can be kept sufficiently cold at all times, even during times at which cooling of an object by means of ejection of cryogenic fluid through the nozzle orifices is interrupted.
  • According to the invention, a cryogenic nozzle can at all times be held in a standby state, without an actual cryogenic fluid having to be ejected by the nozzle. By using a cryogenic nozzle according to the invention, it can be ensured that a desired cryogenic cooling can instantly be provided, as soon as cryogenic fluid is ejected from the nozzle.
  • Advantageous embodiments of the invention are the subject matter of the dependent claims.
  • According to a preferred embodiment, the supply channel can be brought into fluid communication with the at least one cooling channel. Hereby, it is possible to use the same cryogenic fluid for cooling an object (by means of ejection through nozzle orifices) and for cooling the nozzle body.
  • Expediently, cryogenic fluid entering the nozzle volume via the supply channel can be directed into the at least one cooling channel, especially during times at which an ejection of cryogenic fluid through nozzle orifices is interrupted. This measure enables a particularly efficient usage of cryogenic fluid.
  • Expediently, there are provided control means for directing cryogenic fluid supplied through the supply channel into the nozzle volume and/or the cooling channels. By means of such a control means, an efficient distribution of cryogenic fluid can be provided.
  • The inventive cryognic nozzle is in particular suited for spraying or ejecting liquid nitrogen.
  • From time to time maintenance actions or repair operations have to be carried out in order to retain or restore the desired function of the cryogenic nozzle. Then it is not only necessary to stop operation of the cryogenic nozzle but also to warm up the cryogenic nozzle. In such cases it is preferred to pass a heating medium through said at least one fluid channel of said cryogenic nozzle. The heating fluid will heat up the cryogenic nozzle such that the maintenance work can be started earlier. The down-time of the cryogenic nozzle can be considerably shortened.
  • According to a preferred embodiment a gaseous medium is used as heating fluid. Preferred heating media are in particular inert gases, such as gaseous nitrogen.
  • Further advantages and embodiments of the invention will become apparent from the description and the appended figures.
  • It should be noted that the previously mentioned features and the features to be further described in the following are usable not only in the respectively indicated combination but also in further combinations or taken alone, without departing from the scope of the present invention.
    • Brief description of the figures
  • Figure 1 shows a first preferred embodiment of a cryogenic nozzle according to the invention, used for direct cryogenic cooling of an object in a schematic side view.
    • Preferred embodiment of the invention
  • In Figure 1, a preferred embodiment of a cryogenic nozzle according to the invention is generally designated 100. It is used for direct cryogenic cooling of an object 200, for example for cooling a roll for rolling aluminium sheets.
  • The cryogenic nozzle 100 comprises a nozzle body 110 defining a nozzle volume 120 and at least one nozzle orifice 122. A supply channel for supplying a cryogenic fluid, for example liquid nitrogen (LIN), to the nozzle volume 120 is designated 114.
  • Cryogenic fluid entering the nozzle volume 120 through supply channel 114 is ejected through at least one nozzle orifice 122. After exiting the at least one nozzle orifice 122, the cryogenic fluid impinges on object 200, thus providing an effective direct cryogenic cooling.
  • Nozzle body 110 is further provided with cooling channels 124, through which a cryogenic fluid can be transported or circulated. The cryogenic fluid flowing through cooling channels 124 can be the same fluid as provided through supply channel 114 for cooling object 200. Also, it can be provided as a different cryogenic fluid. It is possible to provide cryogenic fluid for cooling channels 124 via supply channel 114. Also a separate supply for providing cooling channels 124 with cryogenic fluid is possible.
  • By providing a flow of cryogenic fluid through cooling channels 124 in the nozzle body 110, an effective cooling of cryogenic nozzle 100 can be effected during times at which cooling of body 200 (i.e. passage of cryogenic fluid through nozzle orifices 122) is interrupted. By insuring that the nozzle body 110 is thus cooled at all times, delays in cooling of the object 200 after resumption of direct cooling by ejecting cryogenic fluid through orifices 122 can be minimized. As mentioned above, in prior art systems, after resumption of cooling, an initial evaporation of cryogenic fluid due to a warming up of the nozzle body during interruption of actual cooling had to be taken into account.
  • Cooling channels 124 can also be used to heat up the cryogenic nozzle 100, for example for maintenance operation. In that case a heating fluid, especially warm nitrogen gas, is passed through the cooling channels 124 after the flow of cryogenic fluid through the nozzle orifices 122 has been stopped. Thereby the down-time for maintenance or repair of the cryogenic nozzle 100 will be reduced.

Claims (10)

  1. Cryogenic nozzle comprising a nozzle body (110) defining a nozzle volume (120), a supply channel (114) for supplying cryogenic fluid to the nozzle volume (120), and at least one nozzle orifice (122) for ejecting cryogenic fluid from the nozzle volume (120),
    characterized in that nozzle body (110) is provided with at least one fluid channel (124).
  2. Cryogenic nozzle according to claim 1, wherein supply channel (114) can be brought into fluid communication with the at least one fluid channel (124).
  3. Cryogenic nozzle according to claim 1, wherein cryogenic fluid entering the nozzle volume (120) via supply channel (114) can be directed into the at least one fluid channel (124), especially during times at which an ejection of cryogenic fluid through nozzle orifices (122) is interrupted.
  4. Cryogenic nozzle according to any one of the preceeding claims, comprising control means for directing cryogenic fluid supplied through supply channel (114) into nozzle volume (120) and/or into cooling channels (124).
  5. Cryogenic nozzle according to any one of the preceeding claims, wherein said fluid channel is connected to a source of a cooling medium.
  6. Cryogenic nozzle according to any one of the preceeding claims, wherein said fluid channel is connected to a source of a heating medium.
  7. Method for ejecting a cryogenic fluid by means of a cryogenic nozzle according to any of claims 1 to 6, characterized in that a cooling medium is passed through said at least one fluid channel (124).
  8. Method according to claim 7, characterized in that liquid nitrogen is passed through said at least one fluid channel (124).
  9. Method for ejecting a cryogenic fluid by means of a cryogenic nozzle according to any of claims 1 to 6, characterized in that a heating medium is passed through said at least one fluid channel (124).
  10. Method according to claim 9, characterized in that gaseous nitrogen is passed through said at least one fluid channel (124).
EP13004835.8A 2012-10-11 2013-10-08 Cryogenic nozzle and corresponding method Not-in-force EP2719464B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13004835.8A EP2719464B1 (en) 2012-10-11 2013-10-08 Cryogenic nozzle and corresponding method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12007072 2012-10-11
EP13004835.8A EP2719464B1 (en) 2012-10-11 2013-10-08 Cryogenic nozzle and corresponding method

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EP2719464A1 true EP2719464A1 (en) 2014-04-16
EP2719464B1 EP2719464B1 (en) 2018-05-02

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EP (1) EP2719464B1 (en)
ES (1) ES2676025T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105180550A (en) * 2015-09-06 2015-12-23 江苏润孚机械轧辊制造有限公司 Rolling shutter-type cooling water tank for roll production
CN108817333A (en) * 2018-07-20 2018-11-16 芜湖君华材料有限公司 A kind of closing energy-saving alloy material crystallization storehouse

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB852045A (en) * 1956-10-13 1960-10-19 Bot Brassert Oxygen Technik Ag Improvements in or relating to blast tubes for refining crude iron
US20060163379A1 (en) * 2004-12-30 2006-07-27 Southwest Research Institute Atomizer cooling by liquid circulation through atomizer tip holder
US20080196416A1 (en) * 2007-02-16 2008-08-21 John Martin Girard Method and system for liquid cryogen injection in mixing or blending devices
EP1965054A2 (en) * 2007-02-28 2008-09-03 Mitsubishi Heavy Industries, Ltd. Gas turbine fuel nozzle apparatus and method of controlling fuel nozzle apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB852045A (en) * 1956-10-13 1960-10-19 Bot Brassert Oxygen Technik Ag Improvements in or relating to blast tubes for refining crude iron
US20060163379A1 (en) * 2004-12-30 2006-07-27 Southwest Research Institute Atomizer cooling by liquid circulation through atomizer tip holder
US20080196416A1 (en) * 2007-02-16 2008-08-21 John Martin Girard Method and system for liquid cryogen injection in mixing or blending devices
EP1965054A2 (en) * 2007-02-28 2008-09-03 Mitsubishi Heavy Industries, Ltd. Gas turbine fuel nozzle apparatus and method of controlling fuel nozzle apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105180550A (en) * 2015-09-06 2015-12-23 江苏润孚机械轧辊制造有限公司 Rolling shutter-type cooling water tank for roll production
CN105180550B (en) * 2015-09-06 2018-01-30 江苏润孚机械轧辊制造有限公司 A kind of roll produces roller shutter type cooling water tank
CN108817333A (en) * 2018-07-20 2018-11-16 芜湖君华材料有限公司 A kind of closing energy-saving alloy material crystallization storehouse

Also Published As

Publication number Publication date
EP2719464B1 (en) 2018-05-02
ES2676025T3 (en) 2018-07-16

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