EP3438584B1 - Procédé et appareil de séparation d'air par distillation cryogénique - Google Patents

Procédé et appareil de séparation d'air par distillation cryogénique Download PDF

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Publication number
EP3438584B1
EP3438584B1 EP18186654.2A EP18186654A EP3438584B1 EP 3438584 B1 EP3438584 B1 EP 3438584B1 EP 18186654 A EP18186654 A EP 18186654A EP 3438584 B1 EP3438584 B1 EP 3438584B1
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EP
European Patent Office
Prior art keywords
column
air
turbine
heat exchanger
compressor
Prior art date
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EP18186654.2A
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German (de)
English (en)
French (fr)
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EP3438584A1 (fr
Inventor
Patrice Cavagne
Bénédicte DOS SANTOS
Yann-Pierrick LEMAIRE
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Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Priority claimed from FR1757497A external-priority patent/FR3069914B1/fr
Priority claimed from FR1757495A external-priority patent/FR3069915B1/fr
Priority claimed from FR1757493A external-priority patent/FR3069913B1/fr
Priority claimed from FR1757498A external-priority patent/FR3069916B1/fr
Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP3438584A1 publication Critical patent/EP3438584A1/fr
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Publication of EP3438584B1 publication Critical patent/EP3438584B1/fr
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    • 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
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04812—Different modes, i.e. "runs" of operation
    • F25J3/04818—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
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed 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
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04563—Integration with a nitrogen consuming unit, e.g. for purging, inerting, cooling or heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
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    • F25J3/0295—Start-up or control of the process; Details of the apparatus used, e.g. sieve plates, packings
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    • F25J3/04024—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of purified feed air, so-called boosted air
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    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
    • F25J3/04054—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams of 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
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
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    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
    • F25J3/0406—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams of 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
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    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
    • F25J3/04066—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams of oxygen
    • 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
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    • F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
    • F25J3/0409—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression of oxygen
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    • 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
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04109—Arrangements of compressors and /or their drivers
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    • 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
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
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    • F25J3/04115—Arrangements of compressors and /or their drivers characterised by the type of prime driver, e.g. hot gas expander
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    • 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
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    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04163—Hot end purification of the feed air
    • F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
    • F25J3/04175—Hot end purification of the feed air by adsorption of the impurities at a pressure of substantially more than the highest pressure column
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    • F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
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    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
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    • F25J3/04854—Safety aspects of operation
    • F25J3/0486—Safety aspects of operation of vaporisers for oxygen enriched liquids, e.g. purging of liquids
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    • F25J2280/20—Control for stopping, deriming or defrosting after an emergency shut-down of the installation or for back up system
    • 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
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/12—Particular process parameters like pressure, temperature, ratios

Definitions

  • the present invention relates to a method and an apparatus for separating air by cryogenic distillation.
  • the invention relates to an apparatus for separating air by cryogenic distillation, in particular to an apparatus using a heat exchanger to cool all the air intended for distillation.
  • the device is kept cold at least partially by one or two turbines, at least one of which is optionally coupled to a compressor.
  • An air compressor has an inlet temperature which is an intermediate temperature of the heat exchanger, less than 0 ° C or even less than -50 ° C. It receives air from an intermediate level of the heat exchanger.
  • Another air compressor may have an inlet temperature above 0 ° C.
  • FR-A-2851330 which describes a method according to the preamble of claim 1, to connect the outlet of a cold compressor to the inlet of a turbine by parallel pipes, passing through the main heat exchanger of the air separation and the other does not pass there.
  • it is recommended to send the compressed air in the cold compressor to the turbine without passing through the heat exchanger, to avoid sending too hot air.
  • the hot air from the compressor 5 passes via the valve V1 to the exchanger, which could damage the exchanger.
  • the expanded air is sent to a medium pressure column of a double distillation column and separated to form at least one product enriched in oxygen or nitrogen.
  • the present invention can make it possible to reduce the cost of the installation, to facilitate restarting and the calculation of the pressures required for the installation.
  • a check valve also called a non-return valve, is a valve that allows fluids to flow downstream, but that closes automatically to block any fluid that goes upstream.
  • the pressure to be supported by the heat exchanger is necessary to define the pressure to be supported by the heat exchanger as a function of the balancing pressure of the valve at the outlet of the cold booster sending air to the turbine. This pressure being greater than that of the turbine inlet for a device without this additional pipe. This could impose a change of waves and therefore an additional cost on the exchanger.
  • the invention proposes to have a check valve on the pipe supplying the two turbines with air coming from an intermediate point of the main heat exchanger.
  • This valve is arranged so that the air arriving from the cold booster from the additional pipe is prevented from arriving in the heat exchanger.
  • the valve closes automatically to prevent air from flowing to the exchanger. In normal operation, it lets air pass from the exchanger to the expansion turbine (s).
  • downstream and upstream in this claim refer to the direction of air flow in normal process operation.
  • an air separation apparatus by cryogenic distillation comprising a heat exchanger, a double separation column comprising a first column and a second column, the second column operating at lower pressure.
  • first column means for sending compressed and purified air to cool in the heat exchanger, a compressor, means for withdrawing a first part of the air at an intermediate temperature at an intermediate point of the heat exchanger and for sending it to the compressor, means for returning compressed air to the compressor in the heat exchanger where it cools, means for sending liquefied air to at least the first column, means for sending liquids enriched with oxygen and nitrogen from the first column to the second column, means for withdrawing a fluid enriched with oxygen in the tank of the second column, means for withdrawing a nitrogen-enriched fluid from the head of the second column and means for sending the nitrogen-enriched fluid to heat up in the heat exchanger, a withdrawal line for removing a second part of the air from the heat exchanger at an intermediate temperature thereof and at an intermediate point of the heat exchanger, possibly means for
  • downstream and upstream in this claim refer to the direction of air flow in normal operation of the device.
  • the apparatus comprising a column system comprising a column operating at a first pressure K1 and a column operating at a second pressure K2 lower than the first pressure.
  • the columns are thermally connected through a tank reboiler of the second column heated by nitrogen from the top of the first column.
  • Non-illustrated reflux flows enriched in nitrogen and oxygen are sent from column K1 to column K2.
  • Liquid oxygen 31 is drawn off from the tank of the second column K2 and nitrogen gas 33 is drawn off at the head of the second column.
  • Liquid nitrogen is sent to the top of the second column through certain phases to help maintain the cold process. Liquid oxygen 31 can vaporize in the heat exchanger E.
  • the apparatus comprises a first air expansion turbine T1, a second air expansion turbine T2, a first air compressor C1 coupled to the first turbine and a second air compressor C2 coupled to the second turbine.
  • the compressed air 1 at a pressure P coming from another compressor is divided into two portions, a first portion 3 of which is sent to the heat exchanger E without having been compressed to a pressure beyond of the pressure P.
  • a second portion 5 is sent to the first compressor C1 where it is compressed to a pressure greater than that (P) of the first portion 3.
  • the output of the first compressor C1 is connected to the input of this compressor by a line 25 through a valve V8.
  • the inlet temperature of compressor C2 is less than 0 ° C, or even less than -50 ° C.
  • the first portion 3 is cooled in the heat exchanger E to an intermediate temperature thereof and an intermediate point P of the exchanger and having not been compressed in the first compressor is sent towards the first and second turbines through the open valve CL3 and the open valves V5, V13, V4, V19, the air being divided in two at a division point D for sending to the two turbines T1, T2.
  • the second portion 5 cools in the heat exchanger E to an intermediate temperature thereof after having been compressed in the first compressor C1. Then it is sent to the second compressor C2.
  • the expanded air from the first and second turbines is sent to the first column K1 to be separated through the valves V6, V15, V11 and the line 13.
  • the second portion 5 is compressed in the second compressor C2, passes through the open valve CL1 and then cools in the heat exchanger before being sent in liquid form to the first column K1 through the valve V9. Valves V2 and V3 are closed.
  • valve V9 is closed and valve V3 open.
  • the valve is disposed on the draw-off line 8 preferably between the point P for drawing off air intended for the turbines and the division point D of the fractions 9 and 11 where the air is shared between the two turbines.
  • This division point can also be used to divide the air intended for the short-circuiting line.
  • the valve must be between the point of arrival A of the air coming from line 23 and the intermediate point P of the exchanger E.
  • valve can be placed on the line 9 if the line 23 opens into the line 9 or on the line 11 if the line 23 opens on the line 11.
  • the first portion 3 is taken out of the heat exchanger at an intermediate temperature thereof and, having not been compressed in the first compressor, is sent to the second compressor C2.
  • the second portion 5 cools in the heat exchanger to an intermediate temperature thereof after having been compressed in the first compressor C1 and is withdrawn at an intermediate point P of the exchanger by a withdrawal pipe 8. Then it is sent to the first and second turbines. In this case, it is the first portion 3 of the air which is diverted, in the event of starting, not to pass any more by the heat exchanger E but directly at the entry of the turbine T1 or T2, even the of them.
  • valve V19 As described above, it is recommended to send part of the air from line 23 into line 9 by opening valve V19 and then to line 11 and the short-circuiting line 15 with its valve V7 .
  • the valve CL3 prevents this air 23 from passing in the opposite direction to that of normal operation and arriving in the exchanger at the intermediate point P.
  • the air sent to the turbine during starting through the line 23 arrives at an arrival point A upstream of the turbines T1, T2, preferably downstream of the division point D, but downstream of the heat exchanger E and the check valve CL3.
  • the valve is disposed on the draw-off line 8 preferably between the point P for drawing off air intended for the turbines and the division point D of the fractions 9 and 11 where the air is shared between the two turbines.
  • This division point can also be used to divide the air intended for the short-circuiting line.
  • the valve must be between the point of arrival A of the air coming from line 23 and the intermediate point P of the exchanger E.
  • valve can be placed on the line 9 if the line 23 opens into the line 9 or on the line 11 if the line 23 opens on the line 11.
  • the invention also applies to the case in which the device comprises only a single air turbine coupled to a cold compressor.
  • the air is sent in normal service from the cold compressor to the heat exchanger.
  • the air can then pass directly into the column system after expansion or otherwise can be sent at least in part to the single turbine.
  • the air from the cold compressor can avoid the heat exchanger by passing through a short-circuiting pipe connected upstream of the inlet of the single turbine. Air can also be sent from this shorting line to another shorting line which allows air to be sent from the cold compressor to the column system, without passing through the turbine, by expanding it in a valve.
  • the air sent to the turbine during startup through line 23 arrives at an arrival point A upstream of the turbine but downstream of the heat exchanger E and of the check valve CL3.
  • the valve CL3 closes the draw-off line 8 and thus prevents the air coming from the line 23 from rising towards the exchanger.
  • the pressure of the exchange line E going towards the suction of the turbine or turbines T1, T2 should be defined as a function of the balancing pressure due to the connection of the anti-pumping valve V3 from the cold booster outlet C2 to the suction of the turbine T2 in the variant in the figure.
  • This balancing pressure is necessarily higher than the pressure of the normal source coming to the turbine. In in some cases, this could impose a change of waves and therefore an additional cost on the exchanger.
  • the design of the exchanger does not take into account the balancing pressure and we just use a flow valve PSV defined on the scenario of a leak of the valve CL3 placed between the outlet P of the exchanger and the CL3 valve.
  • the position of the check valve CL3 upstream of the dividing point D dividing the pipes supplying the two turbines provides a quick way to depressurize the suction of the turbines before restarting if the installation (point of division D) of the additional pipe 11, 15 for bypassing turbines is downstream of this common valve CL3.
  • the operating pressures of the one or two turbines or of the exchanger can be defined without waiting the final design of the pipes to calculate and know the effective volumes to be taken into account in a traditional calculation. This saves time.
  • the design pressure of the exchange line E is therefore completely independent of the balancing pressure thanks to the valve CL3 and a valve to protect the valve from leaking from the valve CL3, so we can define its design pressure very early in the project. independently of the T2 turbine.
  • the design pressure on the T2 turbine does not have a big impact on its cost, we can make volume approximations to define conservatively the balancing pressure to be taken into account on the turbine without having the layout and the exact volume of piping which would allow the balancing pressure to be calculated finely.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP18186654.2A 2017-08-03 2018-07-31 Procédé et appareil de séparation d'air par distillation cryogénique Active EP3438584B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR1757497A FR3069914B1 (fr) 2017-08-03 2017-08-03 Appareil et procede de separation d'air par distillation cryogenique
FR1757495A FR3069915B1 (fr) 2017-08-03 2017-08-03 Appareil et procede de separation d'air par distillation cryogenique
FR1757493A FR3069913B1 (fr) 2017-08-03 2017-08-03 Appareil et procede de separation d'air par distillation cryogenique
FR1757498A FR3069916B1 (fr) 2017-08-03 2017-08-03 Procede de degivrage d'un appareil de separation d'air par distillation cryogenique et appareil adapte pour etre degivre par ce procede

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EP3438584A1 EP3438584A1 (fr) 2019-02-06
EP3438584B1 true EP3438584B1 (fr) 2020-03-11

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EP18186654.2A Active EP3438584B1 (fr) 2017-08-03 2018-07-31 Procédé et appareil de séparation d'air par distillation cryogénique
EP18186659.1A Withdrawn EP3438585A3 (fr) 2017-08-03 2018-07-31 Procédé de dégivrage d'un appareil de séparation d'air par distillation cryogénique et appareil adapté pour être dégivré par ce procédé
EP18186782.1A Active EP3438586B1 (fr) 2017-08-03 2018-08-01 Appareil et procédé de séparation d'air par distillation cryogénique
EP18187381.1A Active EP3438587B1 (fr) 2017-08-03 2018-08-03 Appareil et procédé de séparation d'air par distillation cryogénique

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EP18186782.1A Active EP3438586B1 (fr) 2017-08-03 2018-08-01 Appareil et procédé de séparation d'air par distillation cryogénique
EP18187381.1A Active EP3438587B1 (fr) 2017-08-03 2018-08-03 Appareil et procédé de séparation d'air par distillation cryogénique

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FR3118145B1 (fr) * 2020-12-23 2023-03-03 Air Liquide Procédé de redémarrage d’un appareil de séparation d’air

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CN109387034B (zh) 2021-11-19
US20190049177A1 (en) 2019-02-14
US20190041129A1 (en) 2019-02-07
US10794630B2 (en) 2020-10-06
CN109387033B (zh) 2021-12-14
EP3438586B1 (fr) 2020-04-08
EP3438587A1 (fr) 2019-02-06
CN109387031B (zh) 2021-11-02
CN109387031A (zh) 2019-02-26
EP3438585A2 (fr) 2019-02-06
EP3438585A3 (fr) 2019-04-17
EP3438584A1 (fr) 2019-02-06
PL3438586T3 (pl) 2020-09-07
PL3438587T3 (pl) 2020-09-07
EP3438587B1 (fr) 2020-04-08
US20190049178A1 (en) 2019-02-14
EP3438586A1 (fr) 2019-02-06
CN109387033A (zh) 2019-02-26
CN109387032A (zh) 2019-02-26
US20190041130A1 (en) 2019-02-07
US10866024B2 (en) 2020-12-15
CN109387034A (zh) 2019-02-26

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