EP1363092A1 - Verfahren und Vorrichtung zur Tieftemperatur-Zerlegung von Luft - Google Patents
Verfahren und Vorrichtung zur Tieftemperatur-Zerlegung von Luft Download PDFInfo
- Publication number
- EP1363092A1 EP1363092A1 EP03006695A EP03006695A EP1363092A1 EP 1363092 A1 EP1363092 A1 EP 1363092A1 EP 03006695 A EP03006695 A EP 03006695A EP 03006695 A EP03006695 A EP 03006695A EP 1363092 A1 EP1363092 A1 EP 1363092A1
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- Prior art keywords
- liquid fraction
- air
- column system
- heat exchange
- heat exchanger
- 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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- 238000000926 separation method Methods 0.000 title claims description 20
- 239000007788 liquid Substances 0.000 claims abstract description 51
- 238000000034 method Methods 0.000 claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 90
- 229910052786 argon Inorganic materials 0.000 claims description 45
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 claims description 4
- PWKWDCOTNGQLID-UHFFFAOYSA-N [N].[Ar] Chemical compound [N].[Ar] PWKWDCOTNGQLID-UHFFFAOYSA-N 0.000 claims description 2
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 8
- 238000000354 decomposition reaction Methods 0.000 abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 239000007789 gas Substances 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 238000004781 supercooling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000002631 hypothermal effect Effects 0.000 description 2
- 239000012263 liquid product Substances 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 241000883306 Huso huso Species 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 150000002835 noble gases Chemical class 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229940116238 revex Drugs 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000013526 supercooled liquid Substances 0.000 description 1
Images
Classifications
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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
- F25J3/04406—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 using a dual pressure main column system
- F25J3/04412—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 using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
-
- 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
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—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
- 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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- 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
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—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
- 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
- F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low pressure column
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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
- F25J3/04642—Recovering noble gases from air
- F25J3/04648—Recovering noble gases from air argon
- F25J3/04654—Producing crude argon in a crude argon column
- F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
- F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
- F25J3/04678—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser cooled by oxygen enriched liquid from high pressure column bottoms
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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
- F25J3/04642—Recovering noble gases from air
- F25J3/04648—Recovering noble gases from air argon
- F25J3/04654—Producing crude argon in a crude argon column
- F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
- F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
- F25J3/04703—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser being arranged in more than one vessel
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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
- F25J3/04642—Recovering noble gases from air
- F25J3/04648—Recovering noble gases from air argon
- F25J3/04721—Producing pure argon, e.g. recovered from a crude argon column
- F25J3/04727—Producing pure argon, e.g. recovered from a crude argon column using an auxiliary pure argon column for nitrogen rejection
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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
- F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
- F25J2235/58—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being argon or crude argon
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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
- 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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- 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
- F25J2245/40—Processes or apparatus involving steps for recycling of process streams the recycled stream being air
Definitions
- the invention relates to a method for the low-temperature separation of air in one Rectification column system, which has at least one separation column, a first Airflow cooled in a main heat exchanger and into the rectification column system is initiated, a second air flow to work relaxed and downstream of the Work-related relaxation through indirect heat exchange with a liquid Fraction from the rectification column system is heated.
- the rectification column system can be a one, two or more column system act for nitrogen-oxygen separation. If necessary, that can Rectification column system one or more additional columns for the extraction of others Air components, especially noble gases.
- JP 61079978 A A method of the type mentioned is known from JP 61079978 A. Similar Processes are described in DE 2518557 C and from Rathbone, "Latest developments in the field of cryogenic techniques for gas separation ", Proceedings of the International Symposium on Gas Separation Technology, Antwerp, Belgium, September 10-15, Shown in 1989. The work-relaxed air is not here Rectification column system fed, but warmed in the main heat exchanger and then discarded.
- the invention is based, such a method and a task specify appropriate device that are particularly economical to operate.
- the "main heat exchanger” can be in the invention by any known type of Heat exchangers are formed by regenerators or by a recuperative - switchable or non-switchable - heat exchanger. It can be from a block or several blocks connected in parallel and / or in series.
- the "additional heat exchanger" according to the invention is preferably by a single, separate heat exchanger block formed by no other Process streams as the second air stream and the liquid fraction to be cooled be directed.
- An alternative is an integration in a supercooling counterflow conceivable through which other process streams of the process flow.
- the "second air flow” can, for example, be separate from the “first air flow” compressed and / or cleaned. Alternatively, both air flows become common compressed and cleaned and upstream of the cooling in the main heat exchanger or at an intermediate temperature of the main heat exchanger. In a Another variant (for example, when the air cools down in a switchable Main heat exchanger - Revex), the second air flow can also come from one of the columns of the rectification column system, for example above some Plywood floors from the high-pressure column of a two-column system.
- the "work relaxation” is carried out in a relaxation machine, preferably in an expansion turbine.
- the second air flow can be downstream of the indirect heat exchange with the liquid fraction partially or completely as a heating stream in the Main heat exchanger to be warmed up.
- the second air stream is downstream of its heating in the Main heat exchanger removed from the process. This means that he is neither the one Rectification column system, still (in a circulatory system) to the work-related relaxation is returned. He can be in the atmosphere blown off or used as an impure product.
- the Main heat exchanger can be the second air flow downstream of the indirect Heat exchange with the liquid fraction at least partially in one or several separation columns of the rectification column system are introduced. Doing so at least part of the second air flow of indirect heat exchange with the liquid fraction introduced as a blowing stream into the rectification column system, especially in the low pressure column of a two or more column system.
- the heating current can be downstream of the indirect heat exchange with the liquid fraction with a product or residual stream from the rectification column system are mixed, for example with an impure nitrogen stream from the Low pressure column of a two-column system.
- part of the from the Expansion machine exiting air into a column of the rectification column system be introduced, for example in the low pressure column of a two-column system.
- the mixing can be upstream or downstream of the main heat exchanger take place, but it is preferably between the outlet from the additional heat exchanger carried out. The mixture is then removed from the process and for example blown off into the atmosphere or used as an impure product.
- this top cold is preferably achieved in that the liquid fraction downstream of the indirect heat exchange in the Additional heat exchanger in the evaporation space of a condenser evaporator is initiated.
- the cold is caused by indirect heat exchange transferred to a condensing stream.
- the liquid fraction can be relaxed.
- Cooling in the additional heat exchanger results in a particularly low level Flash gas amount.
- the rectification column system for one or more columns Has argon recovery and liquid return for in the condenser-evaporator at least one of the columns for argon production is generated.
- "Pillars for Argon production represents, for example, a raw argon column (for argon-oxygen separation) and / or a pure argon column (for argon-nitrogen separation). Die supercooled liquid fraction can be used to cool the head of one or both of these columns, especially the crude argon column.
- Heat exchange in the additional heat exchanger causes the transfer of one increased amount of cold and thus an up to 6% improved argon yield. Due to the increased supercooling of the liquid for the crude argon column head cooling there is also greater flexibility in positioning the Relief valve upstream of the condenser-evaporator.
- the liquid fraction is preferably in the Bottom evaporator of a pure argon column cooled.
- This sump evaporator is used for Generation of rising steam for the pure argon column.
- a liquid from the lower region is, for example, a liquid fraction one of the pillars of the rectification column system, especially from the lower area the high-pressure column of a two-column system for nitrogen-oxygen separation used. It is usually enriched with oxygen, which means that it has one higher oxygen content than air.
- the generated during the work-relieving relaxation of the second air stream mechanical energy can at least partially compress the first and / or second air flow can be used by an appropriate compressor is mechanically coupled to the relaxation machine.
- the invention also relates to a device according to claim 13.
- Atmospheric air 1 is in an air compressor 2 to a pressure of brought, for example, 6 bar, overflows 3 after passing through an after-cooling Line 4 to a post-compressor 5 and there continues to, for example, 16.5 bar compacted. After a further after-cooling 6 is branched out through line 7 flowing air into a first air flow 8 and into a second air flow 201.
- the cleaning device - usually a molecular sieve station - is preferably located between the after-cooler 3 and the post-compressor 5.
- the first air flow 8 is approximately in a main heat exchanger 9 Cooled dew point temperature and via line 10 - if necessary after Throttling 11 - fed into the high pressure column 12 of a rectification column system.
- the rectification column system is in terms of nitrogen-oxygen separation Two-pillar system built, the one next to the high pressure column 12 Has low pressure column 13. These two columns stand above a condenser evaporator 14, the so-called main condenser, in heat exchanging Connection.
- Oxygenated liquid 15 from the sump of the high pressure column 12 is in cooled a supercooling counterflow 16, via line 17 two later descriptive heat exchangers 18 and 205 passed, there undercooled and then relaxed in a throttle valve 19. (A part of oxygen-enriched liquid can via a bypass line 20 to the Heat exchanger 18 are passed.)
- the relaxed oxygen-enriched Liquid 21 is divided into a first partial flow 22 and a second partial flow 23 branched.
- the first partial flow 22 is in a condenser-evaporator 24, which as Pure argon head condenser is formed, partially evaporated and then via line 25 into the evaporation space of a further condenser-evaporator 26, the crude argon overhead condenser, initiated while the first partial flow directly into the raw argon overhead condenser flows.
- the in the evaporation room of the Crude argon overhead condenser 26 formed vapor 27 and the remaining liquid portion 28 are introduced into the low pressure column at a suitable point.
- the gaseous nitrogen 29 formed at the top of the high pressure column 12 becomes one first part 30 warmed to about ambient temperature in the main heat exchanger 9 and discharged via line 31 as a gaseous pressure product.
- a second part 32 it is passed into the liquefaction space of the main condenser 13. That there Part of the condensate 33 formed is returned to the high-pressure column 12 given up.
- the rest is obtained as a liquid product, partly as liquid pressure nitrogen 36, or after hypothermia 16, throttling 39 and Phase separation 40 (via lines 37 and 38) as pressureless liquid nitrogen 41. Flash gas 42 from the phase separation 40 is together with the top product 43 Low pressure column 14 discharged.
- Impure nitrogen 44 becomes liquid from an intermediate point of the high-pressure column 12 withdrawn, supercooled (16) and via line 45 and throttle valve 46 as a return abandoned the head of the low pressure column 14.
- the rectification column system of the embodiment also has one Argon production with a raw argon column consisting of two parts 58 and 59, and with a pure argon column 60.
- a raw argon column consisting of two parts 58 and 59
- a pure argon column 60 At an intermediate point of the low pressure column 14 an argon-containing oxygen fraction 61 is drawn off and into the first crude argon column 58 initiated.
- the top steam 62 of the first crude argon column continues to the bottom of the second raw argon column 59 out.
- Gaseous raw argon 63 from the head of the second Crude argon column is partially condensed in the crude argon overhead condenser 26. there liquid 64 obtained is returned to the second crude argon column 59 given up.
- the bottom liquid 65 of the second crude argon column 59 is by means of a Pump 66 is conveyed via line 67 to the top of the first crude argon column 58.
- the oxygen-rich liquid 68 from the sump of the first ras 58 is finally in the low pressure column 14 is fed back.
- crude argon 69 remaining in vapor form becomes the Pure argon column 60 supplied at an intermediate point.
- Head steam 70 the Pure argon column 60 is partially condensed in the pure argon column top condenser 24.
- the condensate 71 produced in the process is returned to the top of the pure argon column 60 given up.
- the remaining gas 72 makes them more volatile than argon Components, especially nitrogen, are discharged as residual steam.
- the Bottom evaporator 18 is used to obtain ascending steam Evaporation of a part 74 of those obtained in the bottom of the pure argon column 60 Liquid 73.
- the rest forms the liquid pure argon product 75.
- the second airflow 201 after cooling in Main heat exchanger 9 to an intermediate temperature via line 202 one Work-relieving relaxation fed into a turbine 203 and there to something about Brought atmospheric pressure.
- the work-relaxed air 204 transfers in the Additional heat exchanger 205 their peak cold at about 91 K by indirect Heat exchange with the liquid fraction 15 - 17 from the bottom of the High pressure column 12.
- the liquid fraction is in the additional heat exchanger 205 of about 95 cooled to about 93 K. This reduces the flash gas content at Expansion 19 of the liquid fraction downstream of the additional heat exchanger 205, and accordingly more cold is available for head cooling 26/24 of the raw argon column 58/59 or the pure argon column 60 are available.
- the air flow 206-206 downstream of the additional heat exchanger 205 is at the embodiment offered two ways.
- line 207 he can - if necessary after throttling 208 - the residual gas (impure nitrogen) 53 from the Low pressure column 14 mixed and together with this from the process removed (line 54/55).
- line 209 it can pass through valve 210 and above Line 209 are blown into the low-pressure column 13 at a suitable point.
- the two valves 208, 210 can indicate the quantitative ratio of these two flows any desired value can be set. In extreme cases, one of the two Lines 207, 209 are closed.
- the turbine 203 is coupled to the post-compressor 5 via a common shaft.
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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)
Abstract
Description
Claims (13)
- Verfahren zur Tieftemperatur-Zerlegung von Luft in einem Rektifiziersäulensystem, das mindestens eine Trennsäule (12, 14, 58, 59, 60) aufweist, wobei ein erster Luftstrom (8) in einem Hauptwärmetauscher (9) abgekühlt und in das Rektifiziersäulensystem eingeleitet (10, 11) wird, ein zweiter Luftstrom (201, 202) arbeitsleistend entspannt (203) und stromabwärts der arbeitsleistenden Entspannung (203) durch indirekten Wärmeaustausch (205) mit einer flüssigen Fraktion (15, 17) aus dem Rektifiziersäulensystem angewärmt wird, dadurch gekennzeichnet, dass die flüssige Fraktion (15, 17) stromaufwärts des indirekten Wärmeaustauschs (205) mit dem arbeitsleistend entspannten zweiten Luftstrom (204) in indirekten Wärmeaustausch (16) mit mindestens einem weiteren Prozess-Strom (49, 52) gebracht wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass mindestens ein Teil des zweiten Luftstroms (206) stromabwärts des indirekten Wärmeaustauschs (205) mit der flüssigen Fraktion (15, 17) als Anwärmstrom (207) in dem Hauptwärmetauscher (9) angewärmt wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass der Anwärmstrom (207) stromabwärts seiner Anwärmung im Hauptwärmetauscher (9) mindestens teilweise aus dem Verfahren entfernt (54, 55) wird.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass mindestens ein Teil des der zweiten Luftstroms (206) des indirekten Wärmeaustauschs (205) mit der flüssigen Fraktion (15, 17) als Einblasestrom (209) in das Rektifiziersäulensystem eingeleitet wird, insbesondere in die Niederdrucksäule (13) eines Zwei- oder Mehr-Säulen-Systems.
- Verfahren einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Anwärmstrom (207) stromabwärts des indirekten Wärmeaustauschs (205) mit der flüssigen Fraktion (15, 17) mit einem Produkt- oder Reststrom (53) aus dem Rektifiziersäulensystem vermischt wird.
- Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass an dem indirekten Wärmeaustausch (205) mit der flüssigen Fraktion (15, 17) keine weiteren Prozess-Ströme außer dem arbeitsleistend entspannten zweiten Luftstrom (204) und der flüssigen Fraktion (17) teilnehmen.
- Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die flüssige Fraktion (21, 22, 23) stromabwärts des indirekten Wärmeaustauschs (205) mit der flüssigen Fraktion (15, 17) in den Verdampfungsraum eines Kondensator-Verdampfers (24, 26) eingeleitet wird.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Rektifiziersäulensystem eine oder mehrere Säulen (58, 59, 60) zur Argongewinnung aufweist und in dem Kondensator-Verdampfer (24, 26) flüssiger Rücklauf (64, 71) für mindestens eine der Säulen (59, 60) zur Argongewinnung erzeugt wird.
- Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass das Rektifiziersäulensystem eine Rohargonsäule (59) zur Argon-Sauerstoff-Trennung aufweist und in dem Kondensator-Verdampfer (26) flüssiger Rücklauf (64) für die Rohargonsäule (59) erzeugt wird.
- Verfahren nach Anspruch 8 oder 2, dadurch gekennzeichnet, dass das Rektifiziersäulensystem eine Reinargonsäule (60) zur Argon-Stickstoff-Trennung umfasst, wobei die Reinargonsäule (60) einen Sumpfverdampfer (18) aufweist und die flüssige Fraktion (17) stromaufwärts des Zusatzwärmetauschers (205) in dem Sumpfverdampfer (18) abgekühlt wird.
- Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die flüssige Fraktion (15, 17) aus dem unteren Bereich einer der Säulen des Rektifiziersäulensystem, insbesondere aus dem unteren Bereich der Hochdrucksäule (12) eines Zwei-Säulen-Systems (12/14) zur Stickstoff-Sauerstoff-Trennung, entnommen wird.
- Verfahren nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die bei der arbeitsleistenden Entspannung (203) des zweiten Luftstroms (201, 202) erzeugte mechanische Energie mindestens teilweise zur Verdichtung (5) des ersten und/oder zweiten Luftstroms eingesetzt wird.
- Vorrichtung zur Tieftemperatur-Zerlegung von Luft mit einem Rektifiziersäulensystem, das mindestens eine Trennsäule (12, 14, 58, 59, 60) aufweist, mit einer ersten Luftleitung (8, 10) für einen ersten Luftstrom, wobei die erste Luftleitung (8, 10) durch einen Hauptwärmetauscher (9) in das Rektifiziersäulensystem führt, und mit einer zweiten Luftleitung (201, 202, 204, 206, 207, 54, 55) für einen zweiten Luftstrom, wobei die zweite Luftleitung (201, 202, 204, 206, 207, 54, 55) durch eine Entspannungsmaschine (203) und weiter zu einem Zusatzwärmetauscher (205) zur Anwärmung des zweiten Luftstroms (204) stromabwärts der Entspannungsmaschine (203) und stromaufwärts seiner Einleitung in den Hauptwärmetauscher (9) durch indirekten Wärmeaustausch mit einer flüssigen Fraktion (15, 17) aus dem Rektifiziersäulensystem führt, gekennzeichnet durch Mittel (16) zum indirekten Wärmeaustausch eines weiteren Prozess-Stroms (49, 52) mit der flüssigen Fraktion (15, 17) stromaufwärts des indirekten Wärmeaustauschs (205) mit dem arbeitsleistend entspannten zweiten Luftstrom (204).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03006695A EP1363092A1 (de) | 2002-05-17 | 2003-03-26 | Verfahren und Vorrichtung zur Tieftemperatur-Zerlegung von Luft |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10222121A DE10222121A1 (de) | 2002-05-17 | 2002-05-17 | Verfahren und Vorrichtung zur Tieftemperatur-Zerlegung von Luft |
| DE10222121 | 2002-05-17 | ||
| EP02014454 | 2002-06-28 | ||
| EP02014454 | 2002-06-28 | ||
| EP03006695A EP1363092A1 (de) | 2002-05-17 | 2003-03-26 | Verfahren und Vorrichtung zur Tieftemperatur-Zerlegung von Luft |
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| Publication Number | Publication Date |
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| EP1363092A1 true EP1363092A1 (de) | 2003-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| EP03006695A Withdrawn EP1363092A1 (de) | 2002-05-17 | 2003-03-26 | Verfahren und Vorrichtung zur Tieftemperatur-Zerlegung von Luft |
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| EP (1) | EP1363092A1 (de) |
| DE (1) | DE10222121A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3772627A1 (de) * | 2019-08-09 | 2021-02-10 | Linde GmbH | Verfahren und anlage zur tieftemperaturzerlegung von luft |
| EP4150275A1 (de) * | 2020-05-11 | 2023-03-22 | Praxair Technology, Inc. | System und verfahren zur rückgewinnung von stickstoff, argon und sauerstoff in einer kryogenen luftzerlegungseinheit mit moderatem druck |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6179978A (ja) * | 1984-09-28 | 1986-04-23 | 株式会社日立製作所 | アルゴンを採取する空気分離装置の制御方法 |
| JPS61256174A (ja) * | 1985-05-07 | 1986-11-13 | 株式会社日立製作所 | アルゴンを採取する空気分離装置の制御方法 |
| EP0669509A1 (de) * | 1994-02-24 | 1995-08-30 | Linde Aktiengesellschaft | Verfahren und Vorrichtung zur Gewinnung von reinem Argon |
| US5704229A (en) * | 1996-12-18 | 1998-01-06 | The Boc Group, Inc. | Process and apparatus for producing nitrogen |
| EP0860670A2 (de) * | 1997-02-11 | 1998-08-26 | Air Products And Chemicals, Inc. | Lufttrennung mit Verdampfung und Expansion eines Fluidiums unter mittlerem Druck |
| DE10153919A1 (de) * | 2001-11-02 | 2002-05-08 | Linde Ag | Verfahren und Vorrichtung zur Gewinnung hoch reinen Sauerstoffs aus weniger reinem Sauerstoff |
-
2002
- 2002-05-17 DE DE10222121A patent/DE10222121A1/de not_active Withdrawn
-
2003
- 2003-03-26 EP EP03006695A patent/EP1363092A1/de not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6179978A (ja) * | 1984-09-28 | 1986-04-23 | 株式会社日立製作所 | アルゴンを採取する空気分離装置の制御方法 |
| JPS61256174A (ja) * | 1985-05-07 | 1986-11-13 | 株式会社日立製作所 | アルゴンを採取する空気分離装置の制御方法 |
| EP0669509A1 (de) * | 1994-02-24 | 1995-08-30 | Linde Aktiengesellschaft | Verfahren und Vorrichtung zur Gewinnung von reinem Argon |
| US5704229A (en) * | 1996-12-18 | 1998-01-06 | The Boc Group, Inc. | Process and apparatus for producing nitrogen |
| EP0860670A2 (de) * | 1997-02-11 | 1998-08-26 | Air Products And Chemicals, Inc. | Lufttrennung mit Verdampfung und Expansion eines Fluidiums unter mittlerem Druck |
| DE10153919A1 (de) * | 2001-11-02 | 2002-05-08 | Linde Ag | Verfahren und Vorrichtung zur Gewinnung hoch reinen Sauerstoffs aus weniger reinem Sauerstoff |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3772627A1 (de) * | 2019-08-09 | 2021-02-10 | Linde GmbH | Verfahren und anlage zur tieftemperaturzerlegung von luft |
| EP4150275A1 (de) * | 2020-05-11 | 2023-03-22 | Praxair Technology, Inc. | System und verfahren zur rückgewinnung von stickstoff, argon und sauerstoff in einer kryogenen luftzerlegungseinheit mit moderatem druck |
| EP4150275B1 (de) * | 2020-05-11 | 2026-02-11 | Praxair Technology, Inc. | System und verfahren zur rückgewinnung von stickstoff, argon und sauerstoff in einer kryogenen luftzerlegungseinheit mit moderatem druck |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10222121A1 (de) | 2003-12-04 |
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