EP2466236A1 - Procédé de production d'un produit d'impression gazeux par décomposition à basse température de l'air - Google Patents

Procédé de production d'un produit d'impression gazeux par décomposition à basse température de l'air Download PDF

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Publication number
EP2466236A1
EP2466236A1 EP11008761A EP11008761A EP2466236A1 EP 2466236 A1 EP2466236 A1 EP 2466236A1 EP 11008761 A EP11008761 A EP 11008761A EP 11008761 A EP11008761 A EP 11008761A EP 2466236 A1 EP2466236 A1 EP 2466236A1
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Prior art keywords
air
compressor
pressure
partial flow
partial
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EP11008761A
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German (de)
English (en)
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Alexander Dr. Alekseev
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Linde GmbH
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Linde GmbH
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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
    • F25J3/04333—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/04339—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of air
    • F25J3/04345—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of air and comprising a gas work expansion loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • 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
    • F25J3/04024—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
    • 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
    • F25J3/04048—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
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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
    • 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
    • F25J3/04078—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
    • F25J3/04084—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 nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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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    • F25J3/04—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
    • F25J3/04078—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
    • 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
    • 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
    • F25J3/04115—Arrangements of compressors and /or their drivers characterised by the type of prime driver, e.g. hot gas expander
    • 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
    • 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
    • F25J3/04151—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
    • 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
    • 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
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04193—Division of the main heat exchange line in consecutive sections having different functions
    • F25J3/042—Division of the main heat exchange line in consecutive sections having different functions having an intermediate feed connection
    • 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
    • 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
    • F25J3/04296—Claude expansion, i.e. expanded into the main or 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
    • F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low pressure column
    • 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
    • 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
    • F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
    • F25J3/04381—Details relating to the work expansion, e.g. process parameter etc. using work extraction by mechanical coupling of compression and expansion so-called companders
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    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
    • F25J3/04393—Details relating to the work expansion, e.g. process parameter etc. using multiple or multistage gas work expansion
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    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
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    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/02—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream
    • F25J2240/10—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream the fluid being air
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    • 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 obtaining a gaseous printed product by cryogenic separation of air according to the preamble of patent claim 1.
  • the distillation column system of the invention can be designed as a two-column system (for example as a classic Linde double column system), or as a three-column or multi-column system. It may in addition to the columns for nitrogen-oxygen separation, further devices for obtaining high purity products and / or other air components, in particular of noble gases, for example, an argon production and / or a krypton-xenon recovery.
  • a liquid pressurized oxygen product stream is vaporized against a heat carrier and finally recovered as a gaseous pressure product.
  • This method is also called internal compression. It serves for the production of pressure oxygen. In the case of a supercritical pressure, no phase transition takes place in the true sense, the product stream is then "pseudo-evaporated".
  • a high-pressure heat carrier is liquefied (or pseudo-liquefied when it is under supercritical pressure).
  • the heat transfer medium is often formed by part of the air, in the present case by the "second partial flow" of the compressed feed air.
  • EP 1139046 A1 EP 1146301 A1 .
  • DE 10213212 A1 DE 10213211 A1 .
  • EP 1357342 A1 or DE 10238282 A1 DE 10302389 A1 .
  • DE 10332863 A1 EP 1544559 A1 .
  • EP 1666824 A1 EP 1672301 A1 .
  • DE 102005028012 A1 .
  • WO 2007033838 A1 WO 2007104449 A1 .
  • EP 1845324 A1 is
  • expansion machine includes any machine for work-relaxing a process stream.
  • the expansion machines are formed in the invention by expansion turbines.
  • the "main heat exchanger” may be formed of one or more parallel and / or serially connected heat exchanger sections, for example one or more plate heat exchanger blocks. It serves to cool the feed air streams in indirect heat exchange with return streams from the distillation column system.
  • the invention is therefore based on the object to provide a method of the type mentioned above and a corresponding device, which are economically particularly favorable to operate.
  • At least a portion of the air from the second expansion machine (third partial flow) is not discarded, but returned to the air compressor.
  • the yield of the system is increased;
  • the second expansion machine can still be operated with a particularly low outlet pressure, ie with relatively high power.
  • the outlet pressure of the second expansion machine is approximately equal to the operating pressure of the low-pressure column (plus line losses).
  • the entire third partial flow can be introduced into the air compressor.
  • at least 30%, in particular at least 50% of the work-performing expanded third partial stream is introduced into the low-pressure column.
  • third partial flow here refers to the entire air flow guided through the second expansion machine.
  • the remainder of the work-performing expanded third partial stream or a part thereof can be fed into the low-pressure column.
  • the supply of the working third partial flow (or a part thereof) in the air compressor can be made for example at the entrance. Alternatively, this supply takes place at an intermediate stage of the air compressor, wherein the air compressor is designed in multiple stages and has at least one first and one last stage, wherein at least a part of the work-performing relaxed third
  • Partial flow is returned to the air compressor downstream of the first stage and upstream of the last stage.
  • the diversion of the third partial stream from the feed air can, for example, be carried out downstream of the cleaning device, for example immediately upstream of the postcompressor, downstream of the postcompressor or also downstream of the first expansion machine.
  • the third partial flow is branched off from the compressed feed air upstream of the cleaning device.
  • Air separation plants of the aforementioned type regularly have a precooling device, in which the compressed feed air upstream of the cleaning device by direct or indirect heat exchange with cooling water. is cooled to remove the heat of compression.
  • the third partial stream upstream of the pre-cooling device can be branched off from the purified feed air.
  • This feature of the invention namely the diversion of a partial air flow upstream of the pre-cooler with subsequent work expansion and return to the air compressor and / or venting to the atmosphere, can be applied in principle to any cryogenic air separation process, even without the above mentioned features; This is especially true when cold is generated in another expansion machine (here: the first expansion machine) and both expansion machines are mechanically coupled with additional compressor, in particular one with a cold compressor and the other with a warm booster.
  • a part of the work-performing expanded third partial flow is discharged into the atmosphere. This may be useful, in particular, when the outlet pressure of the second expansion machine is at the level of the low-pressure column pressure.
  • the total feed air can be compressed together in the warm after-compressor, ie in particular the first, the second and the third partial flow.
  • Air separation plants of the aforementioned type regularly have a pre-cooling device, in which the air upstream of the cleaning device in direct or indirect heat exchange with alternative, the first and the second partial stream are recompressed in the warm booster, and the third partial flow is passed to the warm booster.
  • the diversion of the third partial flow of other air parts takes place here upstream of the warm after-compressor.
  • the second partial flow is recompressed in the warm after-compressor, and the first and the third partial flow are conducted past the warm after-compressor.
  • the diversion of the third partial flow of other parts of the air also takes place here upstream of the warm after-compressor or downstream of the common branch of the first and third partial flow from the purified, but not recompressed feed air flow.
  • the third partial flow is introduced into the second expansion machine at approximately the outlet pressure of the air compressor or below approximately the outlet pressure of the warm after-compressor.
  • the splitting into the first and third partial flow takes place upstream of the work-performing depressions.
  • the two relaxation machines are connected in parallel.
  • the third partial flow is expanded together with the first partial flow in the first expansion machine and fed downstream of the first expansion machine separately from the first partial flow of the second expansion machine.
  • the splitting into the first and third partial flow is therefore carried out only upstream of the first expansion machine.
  • the two expansion machines are connected in series.
  • the air compressor is the only external energy driven machine for compressing air.
  • a single machine is meant here a single stage or multi-stage compressor whose stages are all connected to the same drive, all stages in the same Housing housed or connected to the same gear.
  • the entire feed air is compressed to a pressure which is significantly above the highest pressure of the distillation column system, in particular significantly above the operating pressure of the high-pressure column.
  • This pressure difference between the outlet pressure of the air compressor and the operating pressure of the high-pressure column is, for example, at least 4 bar and is preferably between 6 and 16 bar.
  • the compressed in the air compressor total air (except for possible smaller proportions such as instrument air) is preferably completely divided among the three sub-streams.
  • a nitrogen internal compression can be supplemented by removing a liquid nitrogen product stream from the distillation column system, brought to elevated pressure in the liquid state, vaporized or pseudo-evaporated under this elevated pressure in the main heat exchanger, warmed to about ambient temperature and finally withdrawn as a gaseous nitrogen pressure product stream.
  • the first and the second partial flow 11, 13 are here together via the lines 7 and 10 from the outlet of the cleaning device 5 by a hot booster 8 with aftercooler 9 to the warm end of the main heat exchanger 14 out.
  • a liquid oxygen product stream 30 is withdrawn from the low pressure column 90, pressurized (52) in a liquid state pump (52), vaporized under this elevated pressure in the main heat exchanger or, if the pressure is higher than the critical pressure, pseudo-liquid. evaporated, warmed to about ambient temperature and finally withdrawn as a gaseous oxygen pressure product stream 33.
  • a nitrogen-pressure product can also be obtained by means of internal compression.
  • a liquid nitrogen product stream from the high-pressure column or its top condenser, the main condenser is brought in a pump in the liquid state to an elevated pressure, evaporated under this elevated pressure (line 41) in the main heat exchanger or, if the pressure is higher than the critical Pressure is pseudo-evaporated, warmed to about ambient temperature, and finally withdrawn as a gaseous nitrogen pressure product stream (42).
  • the second partial flow 7 can be precooled upstream of the hot secondary compressor 8.
  • the aftercooler may then be omitted under certain circumstances.
  • one or more parts of the working expanded third partial stream 26 may be directed to other locations of the air compressor, in the low-pressure column and / or in the atmosphere.

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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)
EP11008761A 2010-11-25 2011-11-03 Procédé de production d'un produit d'impression gazeux par décomposition à basse température de l'air Withdrawn EP2466236A1 (fr)

Priority Applications (1)

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EP11008761A EP2466236A1 (fr) 2010-11-25 2011-11-03 Procédé de production d'un produit d'impression gazeux par décomposition à basse température de l'air

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DE102010052544A DE102010052544A1 (de) 2010-11-25 2010-11-25 Verfahren zur Gewinnung eines gasförmigen Druckprodukts durch Tieftemperaturzerlegung von Luft
EP10015789 2010-12-17
EP11008761A EP2466236A1 (fr) 2010-11-25 2011-11-03 Procédé de production d'un produit d'impression gazeux par décomposition à basse température de l'air

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EP2466236A1 true EP2466236A1 (fr) 2012-06-20

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DE102012017488A1 (de) 2012-09-04 2014-03-06 Linde Aktiengesellschaft Verfahren zur Erstellung einer Luftzerlegungsanlage, Luftzerlegungsanlage und zugehöriges Betriebsverfahren
EP2784420A1 (fr) 2013-03-26 2014-10-01 Linde Aktiengesellschaft Procédé de séparation de l'air et installation de séparation de l'air
WO2014154339A2 (fr) 2013-03-26 2014-10-02 Linde Aktiengesellschaft Procédé de séparation d'air et installation de séparation d'air
EP2801777A1 (fr) 2013-05-08 2014-11-12 Linde Aktiengesellschaft Installation de décomposition de l'air dotée d'un entraînement de compresseur principal
DE102014019612A1 (de) 2014-12-30 2015-04-02 Linde Aktiengesellschaft Verfahren und Anlage zur Tieftemperaturzerlegung von Luft
DE102013019504A1 (de) 2013-11-21 2015-05-21 Linde Aktiengesellschaft Verfahren zur Gewinnung eines flüssigen Stickstoffprodukts durch Tieftemperaturzerlegung von Luft und Luftzerlegungsanlage
EP2980514A1 (fr) 2014-07-31 2016-02-03 Linde Aktiengesellschaft Procédé de séparation cryogénique de l'air et installation de séparation d'air
EP3101374A2 (fr) 2015-06-03 2016-12-07 Linde Aktiengesellschaft Procede et installation cryogeniques de separation d'air
EP3196573A1 (fr) 2016-01-21 2017-07-26 Linde Aktiengesellschaft Procede de production d'un produit pneumatique et installation de decomposition d'air
WO2019081065A1 (fr) 2017-10-24 2019-05-02 Linde Aktiengesellschaft Procédé et appareil de traitement d'un mélange de gaz acides
WO2019120619A1 (fr) 2017-12-19 2019-06-27 Linde Aktiengesellschaft Procédé de traitement de gaz comprenant un processus oxydatif fournissant de la chaleur perdue et appareil correspondant
WO2020160842A1 (fr) 2019-02-07 2020-08-13 Linde Gmbh Procédé et appareil de traitement de gaz comprenant un processus oxydatif pour traiter un mélange de gaz acides à l'aide de gaz provenant d'un processus de séparation d'air

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TR201808162T4 (tr) * 2014-07-05 2018-07-23 Linde Ag Havanın düşük sıcaklıkta ayrıştırılması vasıtasıyla bir basınçlı gaz ürününün kazanılmasına yönelik yöntem ve cihaz.
PL2963369T3 (pl) * 2014-07-05 2018-10-31 Linde Aktiengesellschaft Sposób i urządzenie do niskotemperaturowej separacji powietrza
EP3059536A1 (fr) * 2015-02-19 2016-08-24 Linde Aktiengesellschaft Procédé et dispositif destinés à la production d'un produit d'azote pressurisé

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DE102012017488A1 (de) 2012-09-04 2014-03-06 Linde Aktiengesellschaft Verfahren zur Erstellung einer Luftzerlegungsanlage, Luftzerlegungsanlage und zugehöriges Betriebsverfahren
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EP2980514A1 (fr) 2014-07-31 2016-02-03 Linde Aktiengesellschaft Procédé de séparation cryogénique de l'air et installation de séparation d'air
DE102014019612A1 (de) 2014-12-30 2015-04-02 Linde Aktiengesellschaft Verfahren und Anlage zur Tieftemperaturzerlegung von Luft
EP3101374A2 (fr) 2015-06-03 2016-12-07 Linde Aktiengesellschaft Procede et installation cryogeniques de separation d'air
EP3196573A1 (fr) 2016-01-21 2017-07-26 Linde Aktiengesellschaft Procede de production d'un produit pneumatique et installation de decomposition d'air
EP3205963A1 (fr) 2016-01-21 2017-08-16 Linde Aktiengesellschaft Procédé de production d'un produit pneumatique et installation de décomposition d'air
WO2019081065A1 (fr) 2017-10-24 2019-05-02 Linde Aktiengesellschaft Procédé et appareil de traitement d'un mélange de gaz acides
WO2019120619A1 (fr) 2017-12-19 2019-06-27 Linde Aktiengesellschaft Procédé de traitement de gaz comprenant un processus oxydatif fournissant de la chaleur perdue et appareil correspondant
WO2020160842A1 (fr) 2019-02-07 2020-08-13 Linde Gmbh Procédé et appareil de traitement de gaz comprenant un processus oxydatif pour traiter un mélange de gaz acides à l'aide de gaz provenant d'un processus de séparation d'air

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