EP3322947B1 - Procédé de refroidissement d'un flux de traitement - Google Patents

Procédé de refroidissement d'un flux de traitement Download PDF

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Publication number
EP3322947B1
EP3322947B1 EP16738675.4A EP16738675A EP3322947B1 EP 3322947 B1 EP3322947 B1 EP 3322947B1 EP 16738675 A EP16738675 A EP 16738675A EP 3322947 B1 EP3322947 B1 EP 3322947B1
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EP
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Prior art keywords
heat exchanger
cooled
stream
process stream
helium
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EP16738675.4A
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German (de)
English (en)
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EP3322947A1 (fr
Inventor
Lutz Decker
Andres Kündig
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Linde GmbH
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Linde GmbH
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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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0005—Light or noble gases
    • F25J1/0007—Helium
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0005—Light or noble gases
    • F25J1/001—Hydrogen
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
    • F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/007—Primary atmospheric gases, mixtures thereof
    • F25J1/0072—Nitrogen
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0221—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using the cold stored in an external cryogenic component in an open refrigeration loop
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0244—Operation; Control and regulation; Instrumentation
    • F25J1/0245—Different modes, i.e. 'runs', of operation; Process control
    • F25J1/0247—Different modes, i.e. 'runs', of operation; Process control start-up of the process
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0244—Operation; Control and regulation; Instrumentation
    • F25J1/0254—Operation; Control and regulation; Instrumentation controlling particular process parameter, e.g. pressure, temperature
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0262—Details of the cold heat exchange system
    • F25J1/0264—Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/06—Splitting of the feed stream, e.g. for treating or cooling in different ways
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/42—Nitrogen
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/02—Mixing or blending of fluids to yield a certain product
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/30—Helium
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/32—Neon
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/12—External refrigeration with liquid vaporising loop

Definitions

  • the invention relates to a method for cooling a process stream against an auxiliary stream, the heat exchange between the process stream and the auxiliary stream taking place in a first heat exchanger and a second heat exchanger connected downstream of the latter.
  • auxiliary streams Generic methods for precooling a process stream against an auxiliary stream are used, for example, in cryogenic refrigeration and liquefaction plants, such as helium and neon refrigeration plants, hydrogen and helium liquefiers, etc.
  • Such refrigeration and liquefaction systems generally have a pre-cooling circuit in which the process stream to be cooled and possibly liquefied is cooled against an auxiliary stream, for example against liquefied nitrogen (LN 2 ).
  • LN 2 liquefied nitrogen
  • Liquid nitrogen is a comparatively inexpensive cold source. It enables the process stream to be cooled down to a temperature of approx. 80 K.
  • the process flow is cooled against the auxiliary flow in two heat exchangers arranged in series.
  • the circulating auxiliary flow or liquefied nitrogen is separated into a liquid and a gas fraction after its relaxation, as is shown in FIG Figure 1 will be explained. While the liquid fraction is passed in countercurrent to the process stream to be cooled through both heat exchangers, initially being passed through the second, colder heat exchanger, the gas fraction is only passed in countercurrent to the process stream to be cooled through the first or warmer of the two heat exchangers.
  • Particle accelerators, fusion research reactors, etc. have comparatively large masses of superconducting magnets and the associated installations. These magnets must be cooled from the ambient temperature (approx. 300 K) to an operating temperature which is usually below 5 K. This cooling procedure can take several days and weeks. As already described at the beginning, for the first cooling phase from approx. 300 K to approx. 80 K Required cold preferably provided by inexpensive liquefied nitrogen. In this case, however, the nitrogen must not be led directly through the cooling channels of the magnets to be cooled, since the nitrogen remaining in them would freeze out in the subsequent cooling phases, in which cooling down to a temperature of less than 5 K, and would lay the channels. For this reason, indirect heat exchange between the liquefied nitrogen and the process stream to be cooled must be implemented.
  • counterflow plate heat exchangers are preferably used for this purpose.
  • these types of heat exchangers are sensitive to excessive temperature gradients between the individual channels and can be damaged or destroyed by excessive thermal expansion forces.
  • the process stream to be cooled is cooled from ambient temperature to a temperature of approximately 80 K.
  • the low or medium pressure flow returned by the magnet or experiment to be cooled remains warm for a comparatively long time and is usually returned to the circuit compressor via a heater at approximately ambient temperature.
  • the high-pressure stream is cooled exclusively in the manner described above by the liquefied nitrogen.
  • the heat of vaporization of the liquefied nitrogen is approximately the same as the enthalpy difference of the nitrogen due to saturated steam at ambient temperature.
  • the enthalpy curve of the helium is constant.
  • the temperature spread between the helium process stream to be cooled and the nitrogen stream at the level of saturated nitrogen vapor is therefore greatest - this is in the area of the cold end of the warm heat exchanger or the warm end of the cold heat exchanger.
  • the object of the present invention is to provide a generic method for cooling a process stream against an auxiliary stream, in which the disadvantages described above are avoided.
  • the process stream to be cooled is divided into two or more, preferably three, partial streams.
  • the volume flows of these partial flows can be regulated by means of one valve each. Only the first and largest partial flow is cooled against the auxiliary flow in the first and second heat exchangers. This cools down to a temperature of approx. 1 K above the temperature of the auxiliary flow.
  • the second partial stream is then mixed into the process partial stream cooled in this way and the process stream thus formed is again added to the second one Heat exchanger supplied and cooled against the auxiliary flow in this. If the process stream is divided into three or more partial streams, the process stream thus formed is cooled again in the second heat exchanger against the auxiliary stream after each additional admixture of a partial stream.
  • the mass flows of the two or more partial flows are regulated in such a way that all process flows to be cooled have approximately the same temperatures at the inlet of the second heat exchanger.
  • the temperatures of the process streams to be cooled differ from one another by no more than 10 K, preferably no more than 5 K, in particular no more than 2 K, at the inlet of the second heat exchanger.
  • Temporary control deviations of up to 10 K, preferably up to 5 K, in particular up to 2 K are thus tolerable.
  • at least one of the valves controlling the flow rates of the two or more partial flows is completely open. As a result, the number of actuators (n + 1 valves) is adjusted to the number of controlled variables (n temperature differences). At the same time, the pressure loss in the process stream is minimized.
  • the thermal load is reduced while the load in the second heat exchanger, preferably auxiliary current evaporator, increases.
  • This allows the temperatures between the process and the auxiliary flow to be adjusted significantly. If the maximum temperature difference in the processes belonging to the prior art is more than 100 K, it can be reduced to less than 50 K by two or more admixtures or division into three or more partial flows. The temperature difference is therefore below the maximum permissible temperature difference for plate heat exchangers, which is between 50 and 100 K depending on the manufacturer and the geometry of the heat exchanger.
  • the maximum permissible temperature difference of the heat exchangers used is at least 70 K, it is basically sufficient if the process stream to be cooled is divided into only two partial streams. In this case, a second or further admixture of partial flows is not absolutely necessary.
  • the maximum temperature difference that occurs can be further reduced by more than two admixtures. Due to the procedure according to the invention, in the case of a helium refrigeration system, the entire high-pressure helium flow available in the refrigeration cycle can be cooled against liquefied nitrogen from the beginning of the cooling phase without exceeding the maximum permissible temperature difference between the individual channels in the plate heat exchangers. The cost of additional equipment and additional logic required to implement the method according to the invention is comparatively low. The method according to the invention also ensures full operational safety at all times.
  • hydrophil gas helium-rich gas
  • neon-rich gas helium-rich gas
  • nitrogen-rich liquid nitrogen-rich gas
  • nitrogen-rich gas helium-rich gas
  • nitrogen-rich liquid nitrogen-rich gas
  • the process stream to be cooled is helium
  • the auxiliary stream is a nitrogen-rich stream.
  • the helium process stream 1 to be cooled is corresponding to a first one in the Figure 1 illustrated embodiment divided into two substreams 2 and 2a. Valves a and b are used to control the volume of the two partial flows.
  • the first and larger partial stream 2 is cooled in the heat exchangers E1 and E2 to a temperature of approximately 1 K above the temperature of the auxiliary stream or liquefied nitrogen 9.
  • a cold, relaxed, nitrogen-rich stream 8 is separated in the separator D into a liquid fraction 9 and a gas fraction 10. Only the liquid fraction 9 is passed through the heat exchanger E2 in countercurrent to the helium partial stream 2 ′ to be cooled in the heat exchanger E2, mixed with the gas fraction 10 and the combined nitrogen-rich auxiliary stream 11 is then passed through in countercurrent to the helium partial stream 2 to be cooled passed the heat exchanger E1 before being withdrawn via line 12 and again in the Figure 1 Circulation compressor, not shown, is supplied.
  • the helium partial flow 3 cooled in the heat exchangers E1 and E2 is now mixed with the second helium partial flow 2a.
  • the helium process stream 4 thus formed is cooled in the heat exchanger E2; the cooled helium process stream 5 is then fed to the load to be cooled and / or at least one expansion device.
  • the volume flows of the helium substreams 2, 2a and 2b are by means of the control valves a, b and c to be regulated such that the temperatures of the process streams 2 ', 4 and 6 to be cooled in the second heat exchanger differ from one another by no more than 10 K, preferably by no more than 5 K, in particular by no more than 2 K.
  • control or control valves are provided within a refrigeration or liquefaction system that are only required during certain operating states, for example in continuous operation, these can possibly take over the function (s) of one of the control valves a, b and c described above. By means of this embodiment, the additional outlay required for fittings or valves can be reduced.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Claims (5)

  1. Procédé pour refroidir un courant de processus par rapport à un courant auxiliaire, l'échange de chaleur entre les courants de processus et auxiliaire s'effectuant dans un premier échangeur thermique et dans un deuxième échangeur thermique monté en aval de celui-ci,
    caractérisé en ce que
    a) le courant de processus (1) est divisé en deux courants partiels (2, 2a, 2b) ou plus,
    b) les débits volumiques des courants partiels (2, 2a, 2b) peuvent être régulés respectivement au moyen d'une vanne (a, b, c),
    c) seul un premier courant partiel (2) est refroidi dans le premier et le deuxième échangeur thermique (E1, E2) par rapport au courant auxiliaire (9, 11), et
    d) le ou les autres courants partiels (2a, 2b) sont mélangés au premier courant partiel (3) refroidi et le courant de processus ainsi formé est de nouveau refroidi dans le deuxième échangeur thermique (E2), dans le cas d'une division en plus de deux courants partiels (2a, 2b), le courant de processus étant une nouvelle fois refroidi dans le deuxième échangeur thermique (E2) après chaque apport d'un courant partiel,
    e) les débits volumiques des courants partiels (2, 2a, 2b) étant régulés de telle sorte que les températures des courants de processus à refroidir dans le deuxième échangeur thermique (E2) ne se différencient pas de plus de 10 K les unes des autres à l'entrée du deuxième échangeur thermique (E2), et
    f) au moins l'une des vannes (a, b, c) qui régulent les débits volumiques des courants partiels étant entièrement ouverte.
  2. Procédé selon la revendication 1, caractérisé en ce que les débits volumiques des courants partiels (2, 2a, 2b) sont régulés de telle sorte que les températures des courants de processus à refroidir dans le deuxième échangeur thermique (E2) ne se différencient pas de plus de 5 K, de préférence pas de plus de 2 K, les unes des autres à l'entrée du deuxième échangeur thermique (E2).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le premier échangeur thermique (E1) et/ou le deuxième échangeur thermique (E2) sont réalisés sous la forme d'échangeurs thermiques à plaques.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le courant de processus (1) à refroidir est un gaz riche en hydrogène, en hélium ou en néon.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que le courant auxiliaire (9, 11) est un liquide riche en azote et/ou un gaz riche en azote.
EP16738675.4A 2015-07-16 2016-07-14 Procédé de refroidissement d'un flux de traitement Active EP3322947B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015009255.3A DE102015009255A1 (de) 2015-07-16 2015-07-16 Verfahren zum Abkühlen eines Prozessstromes
PCT/EP2016/001217 WO2017008910A1 (fr) 2015-07-16 2016-07-14 Procédé de refroidissement d'un flux de traitement

Publications (2)

Publication Number Publication Date
EP3322947A1 EP3322947A1 (fr) 2018-05-23
EP3322947B1 true EP3322947B1 (fr) 2020-02-12

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EP16738675.4A Active EP3322947B1 (fr) 2015-07-16 2016-07-14 Procédé de refroidissement d'un flux de traitement

Country Status (6)

Country Link
US (1) US10677523B2 (fr)
EP (1) EP3322947B1 (fr)
JP (1) JP2018523082A (fr)
CN (1) CN108027198B (fr)
DE (1) DE102015009255A1 (fr)
WO (1) WO2017008910A1 (fr)

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Publication number Priority date Publication date Assignee Title
GB2575980A (en) * 2018-07-30 2020-02-05 Linde Ag High temperature superconductor refrigeration system
FR3110222B3 (fr) * 2020-05-15 2022-04-22 Air Liquide Installation et procédé de réfrigération d’un fluide à température cryogénique

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NL287922A (fr) * 1962-02-12
US3377811A (en) * 1965-12-28 1968-04-16 Air Prod & Chem Liquefaction process employing expanded feed as refrigerant
US3415077A (en) * 1967-01-31 1968-12-10 500 Inc Method and apparatus for continuously supplying refrigeration below 4.2deg k.
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EP3322947A1 (fr) 2018-05-23
CN108027198A (zh) 2018-05-11
JP2018523082A (ja) 2018-08-16
US20180202712A1 (en) 2018-07-19
WO2017008910A1 (fr) 2017-01-19
US10677523B2 (en) 2020-06-09
DE102015009255A1 (de) 2017-01-19
CN108027198B (zh) 2020-05-22

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