EP3550225B1 - Vorrichtung zum kühlen von produkten - Google Patents

Vorrichtung zum kühlen von produkten Download PDF

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Publication number
EP3550225B1
EP3550225B1 EP19157971.3A EP19157971A EP3550225B1 EP 3550225 B1 EP3550225 B1 EP 3550225B1 EP 19157971 A EP19157971 A EP 19157971A EP 3550225 B1 EP3550225 B1 EP 3550225B1
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EP
European Patent Office
Prior art keywords
product
cyclone
refrigerant
rear section
line
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.)
Active
Application number
EP19157971.3A
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German (de)
English (en)
French (fr)
Other versions
EP3550225A1 (de
Inventor
Jean Michel Castel
Florian Follut
Emir Tebib
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.)
Messer France SAS
Original Assignee
Messer France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Messer France SAS filed Critical Messer France SAS
Priority to PL19157971T priority Critical patent/PL3550225T3/pl
Priority to RS20210820A priority patent/RS62045B1/sr
Priority to SI201930081T priority patent/SI3550225T1/sl
Publication of EP3550225A1 publication Critical patent/EP3550225A1/de
Application granted granted Critical
Publication of EP3550225B1 publication Critical patent/EP3550225B1/de
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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
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/02—Centrifugal separation of gas, liquid or oil

Definitions

  • the invention relates to a device for cooling products, with a cyclone which has a housing with a circular cylinder-shaped rear section and an adjoining, conically shaped front section, with a cover on the upper end face of the rear section opposite from the front section with a cover extending concentrically through it , is arranged inside the cyclone at a distance from the cover with a circular gas outlet opening opening out gas discharge line, with a feed nozzle connected to a feed line for a cryogenic refrigerant, which opens tangentially into the rear section in the area of the upper end face, and with at least one feed line opening into the rear section for a product to be cooled.
  • An alternative is the direct contact of the product to be cooled with a cryogenic refrigerant. The refrigerant absorbs part of the product's heat and evaporates or sublimates without leaving any residue.
  • cryogenic refrigerants are liquid, solid or gaseous media which have a temperature of -20 ° C. and below when they come into contact with the product to be cooled.
  • the cryogenic refrigerant is a liquefied gas, such as liquid nitrogen, or carbon dioxide in solid or liquid form.
  • carbon dioxide When using carbon dioxide as a cryogenic refrigerant, this is usually in liquid form under a pressure of over 5.18 bar abs. brought up and relaxed at a nozzle, the so-called relaxation nozzle, to atmospheric pressure (1 bar).
  • the carbon dioxide cools down to one Temperature of minus 78.9 ° C (194 K), with a mixture of carbon dioxide snow and cold carbon dioxide gas. At least the carbon dioxide particles are then used to cool products and, for example, applied to the surface of a product to be cooled or - in the case of a liquid, pasty or powdery product - mixed into the product.
  • a device in which a pumpable product to be cooled and a cryogenic refrigerant, such as liquid nitrogen, liquid carbon dioxide, liquid argon or liquid air, are brought into contact in a vortex screw cooler and are thoroughly mixed. The mixture is then fed to a separating device where the vaporized cryogenic refrigerant is drawn off. The cooled product is then ready for processing in further processes or for packaging.
  • a cryogenic refrigerant such as liquid nitrogen, liquid carbon dioxide, liquid argon or liquid air
  • a device for cooling liquid products in which a cryogenic refrigerant, for example liquid nitrogen or liquid carbon dioxide, is introduced into a container filled with the product to be cooled.
  • the refrigerant evaporates on thermal contact with the product and is drawn off at a head space of the container. After the cooling process, the cooled product is removed via a line branching off from the bottom of the container.
  • the WO 2016/060869 A1 relates to a device for cooling liquid food such as sauces. With this item, the product is led through a pipe into which a cryogenic refrigerant, for example liquid nitrogen, is introduced at one or more points.
  • a cryogenic refrigerant for example liquid nitrogen
  • the device described is, however, very complex in structure, especially since the refrigerant, which expands rapidly when it evaporates, requires the pipeline to be pressure-stable.
  • the DE 10 2014 018981 A1 also relates to a method for producing supercooled carbon dioxide snow, in which liquid carbon dioxide is introduced into an expansion chamber at an expansion nozzle, where it is expanded to form a mixture of carbon dioxide gas and carbon dioxide snow, and then the mixture into a predominantly carbon dioxide snow and a predominantly carbon dioxide gas existing phase is separated.
  • the invention is therefore based on the object of specifying an efficient and easy-to-use possibility for cooling flowable, in particular liquid or powdery products.
  • a device of the type and purpose mentioned at the beginning is characterized in that the outlet opening of the front section is flow-connected to a product outlet for cooled product, in which means are arranged for building up a counter-pressure that counteracts the flow pressure of the product flowing out through the product outlet.
  • the device according to the invention thus comprises a cyclone, the housing of which has, in a manner known per se, a cylindrical rear section and an adjoining, conically shaped front section which opens into an outlet opening.
  • a cover with a gas discharge line also called an immersion tube
  • the cyclone is usually vertical, with the outlet opening of the front section pointing downwards and the gas outlet opening pointing upwards.
  • a feed line for a refrigerant opens tangentially into the rear section of the cyclone and is equipped with a nozzle opening at the end.
  • a feed line for feeding in a product to be cooled opens into the rear section.
  • the feed line for the product opens into the rear section essentially perpendicularly or at an acute angle to the direction of flow of the refrigerant and at a distance from the nozzle opening of the Supply line for the refrigerant.
  • a heating device for example an electrical one.
  • the means for building up a counterpressure include flow resistances within the product discharge, such as an aperture or other narrowing of the free flow cross-section.
  • they comprise a throttle valve, by means of which a specific counterpressure to be achieved can be set. This embodiment is particularly recommended when different products are to be cooled in the device and a certain cooling capacity is required, depending on the type and properties of the product, such as temperature or viscosity and / or the temperature to be set.
  • the throttle valve can also be designed so that it can be regulated and, during the cooling process, a counter pressure can be regulated as a function of a measured parameter, such as the temperature of the product on the outlet side.
  • the means for building up the counterpressure comprise a section of the product discharge, which is designed in the manner of a siphon and comprises at least one line section that extends geodetically upwards.
  • a line section consisting of cooled product is formed in the line section running vertically upwards Column whose weight (for liquid products: hydrostatic pressure) acts as a counter pressure against the flow pressure at the outlet opening of the cyclone.
  • the means for building up a counterpressure can also be combined with one another, for example an orifice or a throttle valve in the product feed line with a line section running vertically upwards.
  • a particularly advantageous embodiment of the invention provides that the feed line for the product to be cooled opens into the rear section in such a way that a product flow flowing out of it is directed into the flow of the refrigerant introduced at the feed nozzle. As a result, an intimate mixing of product and refrigerant is achieved immediately after the product has been supplied.
  • the product is preferably introduced via a feed line which opens perpendicularly to the refrigerant flow and which is guided, for example, through the cover of the rear section and at least with its end section runs essentially parallel to a longitudinal axis of the cyclone.
  • the product is thus introduced into the cyclone essentially perpendicular to the direction of flow of the refrigerant.
  • the feed line for the product can, however, also open into the rear section at an acute angle, with one directional component each parallel and perpendicular to the refrigerant flow.
  • the feed line for the product can also be equipped with a spray nozzle on the mouth side.
  • the feed line for the product does not open into the rear section immediately in front of the feed nozzle for the refrigerant, but rather at an axial distance from it.
  • the feed line for the product preferably opens into the rear section 1 cm to 10 cm in front of the feed nozzle, particularly preferably 2 cm to 5 cm.
  • the product flow encounters an already widened refrigerant flow and is entrained by it.
  • the object of the invention is also achieved with a method for cooling products, using a device according to the invention, with the Features of claim 5 solved.
  • One of them is in the rear section a feed nozzle opening into a cyclone tangentially introduces a cryogenic refrigerant into the cyclone.
  • a product to be cooled is supplied in a product flow directed towards the flow of the refrigerant introduced.
  • the mixture of refrigerant and product is separated in the cyclone, with the product being discharged via a product discharge line which opens out from a conically shaped front section adjoining the rear section.
  • Evaporated refrigerant is discharged via a gas discharge line in the rear section of the cyclone.
  • a counterpressure that counteracts the flow pressure of the outflowing product is generated in the product discharge on the downstream side.
  • the back pressure is set to a predetermined value by means of suitable means or is regulated as a function of a measured value.
  • suitable means for example, a throttle valve or a constriction in the product discharge or the maintenance of a liquid column, against the hydrostatic pressure of which the cooled product has to flow out, can be used as means.
  • the counter pressure is set to a value of 0.03 to 0.2 bar, particularly preferably to a value between 0.05 and 0.1 bar.
  • the cryogenic refrigerant used is preferably liquid nitrogen or liquid carbon dioxide, which when entering the cyclone decomposes to form a mixture of gaseous and solid carbon dioxide.
  • the method according to the invention and the device according to the invention are suitable for cooling liquid, fluidized or powdery products.
  • the device according to the invention is used for cooling food products based on fat or water, in particular liquid food products such as sauces, soups or juices, with or without solid constituents.
  • the product can then undergo further processing steps or one Packaging unit are supplied.
  • the gaseous refrigerant produced during the cooling process for example carbon dioxide gas, is drawn off at the gas discharge line and can, for example, also be used to precool the refrigerant fed to the cyclone.
  • the device 1 shown in the drawings for cooling products comprises a cyclone 2, the housing of which has, in a manner known per se, a rear section 3 with a circular cylindrical cross-section with a radius Rz and an adjoining, conically shaped front section 4, which in an outlet opening 5 with Radius Rp empties.
  • the cyclone 2 is made of a poorly thermally conductive material, such as stainless steel or titanium, and can moreover be equipped with a thermally insulating cover, not shown here.
  • the rear section 3 On its end face opposite the front section 4, the rear section 3 is closed with a cover 6.
  • a cylindrical gas discharge pipe 7 with an inner radius R G which is connected to a gas discharge line in a manner not shown here, is passed through the center of the cover 6, whereby there is an annular space 8 of width B R between the outer wall of the gas discharge pipe 7 and the inner wall of the rear section 3.
  • the gas discharge pipe 7 is led deep into the interior of the cyclone 2 and ends with a gas outlet opening 11 approximately at the level 12 of the transition between the rear section 3 and the front section 4 of the cyclone 2.
  • the rear section 3, the front section 4 and the gas discharge pipe 7 are along a A common vertical axis 9 is arranged, the outlet opening 5 being arranged at the bottom and the gas discharge pipe 7 being arranged at the top of the cyclone 2.
  • the radius Rz is between 10 cm and 15 cm, the radius R G between 5 cm and 10 cm and the radius R P between 5 cm and 10 cm.
  • a feed nozzle 14 for a cryogenic refrigerant opens into the rear section 3 of the cyclone 2, which is flow-connected via a feed line 15 to a source for a cryogenic refrigerant, not shown here.
  • the source is, for example, a tank for cryogenic liquefied nitrogen or for pressure liquefied carbon dioxide.
  • An end section of the feed line 15, on the end face of which the feed nozzle 14 is located, is arranged within a tangential feed section 16 of the cyclone 2 and axially to this.
  • a flange connection 17 ensures a gas-tight connection between feed line 15 and feed section 16.
  • a product feed line 18 is provided which opens into the rear section 3 at an outlet opening 19 in the cover 6 vertically or at an angle, with an additional tangential directional component.
  • the outlet opening 19 is arranged in such a way that it is aligned with the end section of the feed line 15 and opens out in front of the feed nozzle 14 at a distance D of, for example, 2 cm to 5 cm.
  • the outlet opening 5 of the front section 4 is followed by a product discharge line 20 for discharging cooled product, which in the exemplary embodiment shown here has a continuous cross-sectional radius R P which corresponds to the radius of the outlet opening 5 of the cyclone.
  • the product discharge 20 has in the manner of a siphon a U-shaped line section which, when the device 1 is in use, geodetically downwards with a bend 21 and with its Legs 22, 23 are directed upwards, with the leg 22 directly adjoining the outlet opening 5.
  • Elbow 21 and legs 22, 23 of the U-shaped line section are dimensioned in such a way that a liquid column of height H of, for example, 500 mm to 800 mm can be maintained in it.
  • a cryogenic refrigerant for example pressure-liquefied carbon dioxide
  • a pressure of more than 5.18 bar (abs.) For example a pressure between 18 to 20 bar (abs.)
  • a cryogenic refrigerant for example pressure-liquefied carbon dioxide
  • the carbon dioxide expands to form a stream of carbon dioxide gas and carbon dioxide snow, which flows tangentially into the annular space 8 between the inner wall of the rear section 3 and the outer wall of the gas discharge pipe 7 and is there forced onto a spiral-shaped path 25 that descends in the direction of the front section, as in Fig. 2 indicated.
  • another cryogenic refrigerant such as liquid nitrogen, can also be used.
  • a liquid product to be cooled is supplied via the product feed line 18.
  • the product mixes intimately with the refrigerant introduced from the feed nozzle 14 and is entrained by its flow.
  • the refrigerant absorbs heat from the product and at least partially evaporates or sublimates, with the product cooling down.
  • the spiral path 25 of the evaporated refrigerant transforms at the level of the gas outlet opening 11 into a spiral path ascending within the gas discharge pipe 7.
  • the gaseous refrigerant escaping at the gas discharge pipe 7 is then preferably collected and used, for example, to precool the supplied refrigerant in the supply line 15. Due to the circular flows within the cyclone 2, the liquid droplets or particles of the product are thrown against the inner wall of the conical front section 4 at the latest after a few revolutions due to the centrifugal force and decelerated to the extent that they detach from the flow and down towards the outlet opening 5 to run. The Liquid product is then discharged via the U-shaped line section of the product discharge line 20.
  • the supply and expansion of the refrigerant in the cyclone 2 leads to a strong flow pressure of the product in the direction of the product outlet 20.
  • the product When flowing out via the product outlet 20, however, the product must pass the leg 23 of the U-shaped line section and thus a hydrostatic pressure corresponding to the height H. which acts as a back pressure to the flow pressure of the product.
  • the counter pressure of, for example, 0.05 bar to 0.08 bar leads to a longer average contact time of the liquid droplets of the product with the refrigerant and thus to a significantly greater cooling of the product compared to a discharge led directly downwards.
  • the device 1 according to the invention is also suitable in the same way for cooling a powdery product.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
EP19157971.3A 2018-04-06 2019-02-19 Vorrichtung zum kühlen von produkten Active EP3550225B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL19157971T PL3550225T3 (pl) 2018-04-06 2019-02-19 Urządzenie do chłodzenia produktów
RS20210820A RS62045B1 (sr) 2018-04-06 2019-02-19 Uređaj za hlađenje proizvoda
SI201930081T SI3550225T1 (sl) 2018-04-06 2019-02-19 Naprava za hlajenje izdelkov

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018002750.4A DE102018002750B8 (de) 2018-04-06 2018-04-06 Vorrichtung zum Kühlen von Produkten

Publications (2)

Publication Number Publication Date
EP3550225A1 EP3550225A1 (de) 2019-10-09
EP3550225B1 true EP3550225B1 (de) 2021-05-26

Family

ID=65494013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19157971.3A Active EP3550225B1 (de) 2018-04-06 2019-02-19 Vorrichtung zum kühlen von produkten

Country Status (7)

Country Link
EP (1) EP3550225B1 (hu)
DE (1) DE102018002750B8 (hu)
ES (1) ES2882072T3 (hu)
HU (1) HUE054971T2 (hu)
PL (1) PL3550225T3 (hu)
RS (1) RS62045B1 (hu)
SI (1) SI3550225T1 (hu)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2659546A1 (de) * 1976-12-30 1978-07-13 Boehringer Mannheim Gmbh Verfahren zur herstellung von gefrorenen granulaten
FR2496851A1 (fr) * 1980-12-23 1982-06-25 Anhydride Carbonique Ind Dispositif autorefrigerant et autoregule destine au refroidissement et a la congelation de produits et materiaux divers, et procede de mise en oeuvre
JPH089582Y2 (ja) * 1990-08-31 1996-03-21 大陽酸素株式会社 凍結粒製造装置
DE4113512C2 (de) * 1991-04-25 1995-04-20 Grolitsch Lisbeth Verfahren und Vorrichtung zur Gefriertrocknung und Pulverisierung von Lebensmitteln
ITMI20032367A1 (it) 2003-12-03 2005-06-04 Air Liquide Italia S P A Metodo ed impianto per il raffreddamento di fluidi
US20060283195A1 (en) 2005-06-16 2006-12-21 Uwe Rosenbaum Process and apparatus for continuous cooling of pumpable material with a liquid cryogen
EP3009006B1 (en) 2014-10-17 2018-10-03 Linde Aktiengesellschaft Apparatus, system and method for treating a flowable product
DE102014018981A1 (de) 2014-12-18 2016-06-23 Messer France S.A.S Verfahren und Vorrichtung zum Erzeugen von unterkühltem Kohlendioxidschnee

Also Published As

Publication number Publication date
DE102018002750B8 (de) 2020-09-24
HUE054971T2 (hu) 2021-10-28
EP3550225A1 (de) 2019-10-09
RS62045B1 (sr) 2021-07-30
ES2882072T3 (es) 2021-12-01
SI3550225T1 (sl) 2021-08-31
DE102018002750B4 (de) 2020-04-16
PL3550225T3 (pl) 2021-11-02
DE102018002750A1 (de) 2019-10-10

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