EP3438586B1 - Gerät und verfahren zur trennung von luft durch kryogene destillation - Google Patents

Gerät und verfahren zur trennung von luft durch kryogene destillation Download PDF

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Publication number
EP3438586B1
EP3438586B1 EP18186782.1A EP18186782A EP3438586B1 EP 3438586 B1 EP3438586 B1 EP 3438586B1 EP 18186782 A EP18186782 A EP 18186782A EP 3438586 B1 EP3438586 B1 EP 3438586B1
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EP
European Patent Office
Prior art keywords
air
booster
booster compressor
turbine
compressor
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.)
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EP18186782.1A
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English (en)
French (fr)
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EP3438586A1 (de
Inventor
Patrice Cavagne
Nicolas CHAMONTIN
Bénédicte DOS SANTOS
Laurent RICHAUME
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.)
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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Publication date
Priority claimed from FR1757493A external-priority patent/FR3069913B1/fr
Priority claimed from FR1757498A external-priority patent/FR3069916B1/fr
Priority claimed from FR1757497A external-priority patent/FR3069914B1/fr
Priority claimed from FR1757495A external-priority patent/FR3069915B1/fr
Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Priority to PL18186782T priority Critical patent/PL3438586T3/pl
Publication of EP3438586A1 publication Critical patent/EP3438586A1/de
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Publication of EP3438586B1 publication Critical patent/EP3438586B1/de
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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
    • F25J3/04006—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
    • F25J3/04763—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
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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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    • 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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    • F25J3/02—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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    • F25J3/04024—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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    • F25J3/04054—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
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    • 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
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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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    • F25J3/04048—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
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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
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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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    • 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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    • F25J3/04115—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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    • F25J3/04—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
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
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    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
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    • F25J3/04854—Safety aspects of operation
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    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
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    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/40—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval
    • F25J2240/42—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval the fluid being air
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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 an apparatus and a method for separating air by cryogenic distillation according to the preambles of claims 1 and 3 respectively.
  • Such an apparatus and such a method are known from FR-A-2 851 330 . It relates in particular to devices using a supply air supercharger supplied with air coming from an intermediate level of a main supply air cooling exchanger, therefore at a temperature below 0 ° C. . This air is then boosted in the booster and returned to the main exchanger before being sent to a cryogenic distillation column.
  • part of the compressed air is returned to the compressor upstream of the compressor after refrigeration followed by expansion in a valve.
  • the present invention makes it possible to solve the problem by opening a valve to a turbine downstream of the compressor, in order to increase the flow rate in the compressor and thus leave the pumping zone.
  • an air separation apparatus by cryogenic distillation comprising an air compressor to compress all the air to be distilled, an air booster to compress at least part of the air to be distilled, an expansion turbine to receive compressed air from the compressor and possibly from the air booster, a system of cryogenic distillation columns comprising at least one column, a heat exchanger, means for sending air air from the compressor to the heat exchanger having two ends, means for taking cooled air at an intermediate point of the heat exchanger between the two ends and for sending it to the booster, means for sending the compressed air from the booster to the heat exchanger, means for sending cooled air in the heat exchanger to the turbine, means for sending expanded air in the turbine to the system columns, means for withdrawing from the column system a flow enriched in oxygen and a flow enriched in nitrogen, these means being connected to the heat exchanger, means for relieving the air supercharged in the booster, no means of cooling between the discharge of the booster and the means for relieving the supercharged air and means for sending air, supercharged in
  • the booster can be connected to the inlet of the turbine so that the boosted air can at least partially relax in the turbine.
  • 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 second 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.
  • LIN liquid nitrogen is sent to the top of the second column through certain phases to help keep the process cool.
  • An oxygen-rich fluid is sent to heat up at the exchanger E, for example liquid oxygen 31 can vaporize in the heat exchanger E.
  • a nitrogen-rich fluid is sent to heat up at the exchanger E.
  • the apparatus comprises a first air expansion turbine T1, a second air expansion turbine T2, a first air blower C1 coupled to the first turbine and a second air blower C2 coupled to the second turbine.
  • the compressed air 1 at a pressure P from another compressor is divided into two fractions, a first fraction 3 of which is sent to the heat exchanger E without having been compressed to a pressure beyond of the pressure P.
  • a second fraction 5 is sent to the first booster C1 where it is compressed to a pressure higher than that (P) of the first fraction 3.
  • the outlet of the first booster C1 is connected to the inlet of this booster by a line 25 through a valve V8.
  • the first fraction 3 is cooled in the heat exchanger E to an intermediate temperature thereof and not having been compressed in the first booster is sent to the first and the second turbines through the open valve CL3 and the open valves V5, V13, V4, V19.
  • the second fraction 5 cools in the heat exchanger E to an intermediate temperature thereof after being compressed in the first booster C1. Then it is sent to the second booster 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 pipe 13.
  • the second fraction 5 is compressed in the second booster 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.
  • the booster C1 approaches its pumping point, a portion of the boosted air is taken after cooling in a cooler downstream of the booster, expanded by the valve V8 and returned to the suction of the booster C1.
  • the booster C2 supplied with air 19 coming from an intermediate point of the heat exchanger E, approaches its pumping point, no part of the air boosted in the booster C2 is sent at the suction of the C2 booster.
  • the booster C2 has no refrigerant downstream of the booster. If the boosted flow in C2 falls below a threshold indicating that the pumping point is close, a portion of the boosted air is sent via line 23, expanded in valve V3 and arrives at the suction of the turbine. T2 to be relaxed and sent to distillation.
  • the threshold for detecting the approach to the pumping point is defined by defining a pressure drop threshold between two points of the booster not to be exceeded. As long as the pressure drop remains above the threshold, all the compressed air is sent to the heat exchanger to liquefy there.
  • the valve is opened allowing air to pass to the turbine.
  • the rest of the compressed air is returned to the heat exchanger E through the valve CL1 and at least partially liquefies in the exchanger before being expanded in the valve V9 and sent to the column K1.
  • the part of the air sent to the inlet of the turbine T2 can be sent to the outlet of the latter arriving in the pipe 17.
  • the air expansion valve will relax this part of the air up to a pressure slightly above the pressure of column K1.
  • Air can even be sent to the two turbines T1, T2, to the inputs of the two, to the outputs of the two or to the input of one and to the output of the other.
  • the first fraction 3 is taken out of a heat exchanger at an intermediate temperature thereof and, having not been compressed in the first booster, is sent to the second booster C2.
  • the second fraction 5 cools in the heat exchanger to an intermediate temperature thereof after being compressed in the first booster C1. Then it is sent to the first and second turbines.
  • the booster C2 supplied with air 19 coming from an intermediate point of the heat exchanger E, approaches its point of pumping, no part of the air boosted in the booster C2 is sent to the suction of the booster C2.
  • the booster C2 has no refrigerant downstream of the booster.
  • a portion of the boosted air is sent via line 23, expanded in valve V3 and arrives at the suction of the turbine. T2, without passing through the exchanger E, to be expanded in the turbine T2 and sent to distillation.
  • the threshold for detecting the approach to the pumping point is defined by defining a pressure drop threshold between two points of the booster not to be exceeded. This pressure difference is equivalent to the minimum air flow in the booster under which it must not pass. As long as the pressure drop remains above the threshold, all the compressed air is sent to the heat exchanger to liquefy there.
  • the valve is opened allowing air to pass to the turbine.
  • the rest of the compressed air is returned to the heat exchanger E through the valve CL1 and at least partially liquefies in the exchanger before being expanded in the valve V9 and sent to the column K1.
  • the part of the air sent to the inlet of the turbine T2 can be sent to the outlet of the latter arriving in the pipe 17.
  • the air expansion valve will relax this part of the air up to a pressure slightly above the pressure of column K1.
  • Air can even be sent to the two turbines T1, T2, to the inputs of the two, to the outputs of the two or to the input of one and to the output of the other.
  • An oxygen-rich fluid is sent to heat up at the exchanger E, for example liquid oxygen 31 can vaporize in the heat exchanger E.
  • a nitrogen-rich fluid is sent to heat up at the exchanger E.
  • the invention also applies to the case in which the device comprises only a single air turbine coupled to a cold booster.
  • the air is sent in normal service from the cold booster 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 device can comprise a single cold booster and a single turbine, whether or not receiving air from the cold booster outside of the pumping risk period.
  • This invention applies to any process using a cold air blower in an apparatus for separating air by cryogenic distillation. It applies for example to the processes of FR2943408 , WO05064252 , EP2831525 , JP2015114083 , JP54162678 , EP1055894 , EP2600090 , JP2005221199 , EP2963370 , EP2963369 , FR2913760 , FR3033397 , EP2458311 , EP1782011 , EP1711765 , FR2895068 , EP2489968 , DE102011121314 , EP1014020 , FR2985305 , DE102006027650 , FR2861841 , FR3010778 , EP644388 and FR2721383 .
  • the air blower has an inlet temperature preferably between 0 ° C and -180 ° C, or even between -60 ° C and -180 ° C.

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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)

Claims (11)

  1. Einrichtung zur Luftabscheidung durch kryogene Destillation, umfassend einen Luftkompressor zur Kompression der gesamten zu destillierenden Luft, einen Luftverdichter (C2) zum Komprimieren wenigstens eines Teils der zu destillierenden Luft, eine Expansionsturbine (T1, T2) zur Aufnahme der Druckluft aus dem Kompressor und gegebenenfalls aus dem Luftverdichter, ein Säulensystem zur kryogenen Destillation, umfassend wenigstens eine Säule (K1, K2), einen Wärmeaustauscher (E), Mittel zum Transportieren der Luft aus dem Kompressor zum Wärmeaustauscher, der zwei Enden aufweist, Mittel (19) zur Entnahme der abgekühlten Luft an einem Zwischenort des Wärmeaustauschers zwischen den beiden Enden und zu deren Transport zum Luftverdichter, Mittel (CL1, 21) zum Transportieren der im Luftverdichter nachverdichteten Luft zum Wärmeaustauscher, Mittel zum Transportieren der im Wärmeaustauscher abgekühlten Luft (9, 11) zur Turbine, Mittel (17, 13) zum Transportieren der in der Turbine expandierten Luft in das Säulensystem, Mittel zum Abziehen eines mit Sauerstoff (31) angereicherten Volumenstroms und eines mit Stickstoff (33) angereicherten Volumenstroms aus dem Säulensystem, wobei diese Mittel mit dem Wärmeaustauscher verbunden sind, Mittel (V3) zum Expandieren der im Luftverdichter nachverdichteten Luft, kein Kühlmittel zwischen der Druckseite des Luftverdichters und den Mitteln zum Expandieren der nachverdichteten Luft und Mittel zum Transportieren von Luft, die im Luftverdichter nachverdichtet und von Expansionsmitteln expandiert wurde, stromaufwärts oder stromabwärts der Turbine, ohne dass sie nach der Nachverdichtung im Wärmeaustauscher abgekühlt wurde, dadurch gekennzeichnet, dass sie Mittel zum Erkennen des Lastverlustes oder des Durchsatzes zwischen zwei Punkten des Luftverdichters (C2) sowie Mittel zum Öffnen der Expansionsmittel (V3) umfasst, um die stromaufwärts oder stromabwärts der Turbine nachverdichtete Luft zu transportieren, ohne dass sie den Wärmeaustauscher durchläuft, um den Durchsatz im Luftverdichter zu erhöhen, jedoch nur, wenn der Lastverlust oder der Durchsatz eine Schwelle übersteigt, die anzeigt, dass das Pumpen bevorsteht.
  2. Einrichtung nach Anspruch 1, wobei der Luftverdichter (C2) mit dem Eingang der Turbine (T2) dergestalt verbunden ist, dass die nachverdichtete Luft wenigstens teilweise in der Turbine expandieren kann.
  3. Verfahren zur Luftabscheidung durch kryogene Destillation, wobei die gesamte zu destillierende Luft in einem Luftkompressor komprimiert wird, wobei wenigstens ein Teil der im Luftkompressor komprimierten zu destillierenden Luft in einem Luftverdichter (C2) nachverdichtet wird, wobei in wenigstens einer Expansionsturbine (T2, T1) die aus dem Kompressor und gegebenenfalls dem Luftverdichter stammende Druckluft expandiert wird, wobei die in einem Wärmeaustauscher (E) abgekühlte Druckluft in einem Säulensystem zur kryogenen Destillation mit wenigstens einer Säule (K1, K2) abgeschieden wird, wobei die abgekühlte Luft an einem Zwischenort des Wärmeaustauschers zwischen seinen beiden Enden entnommen und zum Luftverdichter transportiert wird, wobei die im Luftverdichter nachverdichtete Luft zum Wärmeaustauscher transportiert wird, wobei die im Wärmeaustauscher abgekühlte Luft an die wenigstens eine Turbine transportiert wird, wobei die in der wenigstens einen Turbine expandierte Luft zu dem Säulensystem transportiert wird, wobei ein mit Sauerstoff (31) angereicherter Volumenstrom und ein mit Stickstoff (33) angereicherter Volumenstrom aus dem Säulensystem abgezogen wird und diese Volumenströme in dem Wärmeaustauscher erhitzt werden, dadurch gekennzeichnet, dass,
    i) wenn der Lastverlust zwischen zwei Punkten des Luftverdichters unter eine Schwelle fällt, die angibt, dass der Pumpenzeitpunkt bevorsteht, oder
    ii) wenn der Durchsatz des Luftverdichters unter einen Mindestdurchsatz fällt, der anzeigt, dass der Pumpenzeitpunkt bevorsteht,
    ein Teil der im Luftverdichter nachverdichteten Luft expandiert wird, ohne dass sie zwischen dem Luftverdichter und der Expansion abgekühlt wird, und die stromaufwärts oder stromabwärts der wenigstens einen Turbine expandierte nachverdichtete Luft transportiert wird, ohne im Wärmeaustauscher nach der Nachverdichtung abgekühlt worden zu sein, und für die Fälle i) und ii), dass der Durchsatz im Luftverdichter für den Abzug aus der Pumpzone erhöht wird.
  4. Verfahren nach Anspruch 3, wobei, wenn, und bevorzugt nur dann wenn der Lastverlust zwischen den zwei Punkten oberhalb der Schwelle liegt und/oder ein Durchsatz des Luftverdichters (C2) oberhalb des Mindestdurchsatzes des Luftverdichters liegt, die gesamte Luft aus dem Luftverdichter zur Abkühlung an den Wärmeaustauscher (E) transportiert wird.
  5. Verfahren nach Anspruch 3, wobei, wenn der Lastverlust zwischen den zwei Punkten des Luftverdichters unter die Schwelle fällt und/oder ein Durchsatz des Luftverdichters unter einen Mindestdurchsatz des Luftverdichters fällt, kein Teil der nachverdichteten Luft stromaufwärts des Luftverdichters transportiert wird.
  6. Verfahren nach Anspruch 3 oder 4, wobei die nachverdichtete und expandierte Luft in der Turbine (T2) expandiert wird, wenn der Lastverlust zwischen den zwei Punkten des Luftverdichters (C2) unter die Schwelle fällt und/oder wenn ein Durchsatz des Luftverdichters unter einen Mindestdurchsatz des Luftverdichters fällt, und bevorzugt kein Luftdurchsatz aus dem Luftverdichter in der Turbine expandiert wird, wenn der Lastverlust zwischen den zwei Punkten des Luftverdichters oberhalb der Schwelle liegt und/oder wenn ein Durchsatz des Luftverdichters oberhalb des Mindestdurchsatzes des Luftverdichters liegt.
  7. Verfahren nach Anspruch 3 oder 4, wobei, wenn der Lastverlust zwischen den zwei Punkten des Luftverdichters (C2) unter die Schwelle fällt und/oder wenn ein Durchsatz des Luftverdichters unter den Mindestdurchsatz des Luftverdichters fällt, die nachverdichtete Luft bis zum Druck einer Säule (K1, K2) des Säulensystems expandiert wird, mit Luft aus der Turbine (T2) vermischt wird und zu der Säule transportiert wird.
  8. Verfahren nach Anspruch 3, 4, 5 oder 6, wobei, wenn der Lastverlust zwischen den zwei Punkten des Luftverdichters oberhalb der Schwelle liegt, die gesamte nachverdichtete Luft zur Abkühlung in den Wärmeaustauscher (E) transportiert wird.
  9. Verfahren nach einem der Ansprüche 3 bis 6 oder 8, wobei die an die Turbine (T2) transportierte nachverdichtete expandierte Luft an eine Turbine transportiert wird, die mit dem Luftverdichter, aus dem die Luft stammt, gekoppelt ist.
  10. Verfahren nach einem der Ansprüche 3 bis 6 oder 8, wobei die an die Turbine transportierte nachverdichtete expandierte Luft an eine Turbine (T2) transportiert wird, die die gesamte Luft, die sie expandiert, vom Luftverdichter (C2) aufnimmt.
  11. Verfahren nach einem der Ansprüche 3 bis 8, wobei die Turbine (T2) die Luft aus dem Luftverdichter nur dann aufnimmt, wenn der Lastverlust zwischen den beiden Punkten des Luftverdichters unterhalb der Schwelle liegt.
EP18186782.1A 2017-08-03 2018-08-01 Gerät und verfahren zur trennung von luft durch kryogene destillation Active EP3438586B1 (de)

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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
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

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EP18186782.1A Active EP3438586B1 (de) 2017-08-03 2018-08-01 Gerät und verfahren zur trennung von luft durch kryogene destillation
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CN109387033A (zh) 2019-02-26
EP3438584B1 (de) 2020-03-11
EP3438587B1 (de) 2020-04-08
US20190041130A1 (en) 2019-02-07
EP3438587A1 (de) 2019-02-06
CN109387031A (zh) 2019-02-26
CN109387032A (zh) 2019-02-26
CN109387031B (zh) 2021-11-02
CN109387034A (zh) 2019-02-26
CN109387033B (zh) 2021-12-14
CN109387034B (zh) 2021-11-19
US10794630B2 (en) 2020-10-06
US20190049177A1 (en) 2019-02-14
US12181217B2 (en) 2024-12-31
EP3438584A1 (de) 2019-02-06
EP3438586A1 (de) 2019-02-06
PL3438587T3 (pl) 2020-09-07
EP3438585A2 (de) 2019-02-06
EP3438585A3 (de) 2019-04-17
US20190049178A1 (en) 2019-02-14
US10866024B2 (en) 2020-12-15
US20190041129A1 (en) 2019-02-07
PL3438586T3 (pl) 2020-09-07

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