EP0383994A2 - Procédé et dispositif de rectification d'air - Google Patents
Procédé et dispositif de rectification d'air Download PDFInfo
- Publication number
- EP0383994A2 EP0383994A2 EP89113815A EP89113815A EP0383994A2 EP 0383994 A2 EP0383994 A2 EP 0383994A2 EP 89113815 A EP89113815 A EP 89113815A EP 89113815 A EP89113815 A EP 89113815A EP 0383994 A2 EP0383994 A2 EP 0383994A2
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- EP
- European Patent Office
- Prior art keywords
- nitrogen
- pressure
- heat exchanger
- fraction
- relaxed
- 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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- 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
- F25J3/04854—Safety aspects of operation
- F25J3/0486—Safety aspects of operation of vaporisers for oxygen enriched liquids, e.g. purging of liquids
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- 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
- F25J3/04078—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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- 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
- F25J3/04151—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
- F25J3/04206—Division of the main heat exchange line in consecutive sections having different functions including a so-called "auxiliary vaporiser" for vaporising and producing a gaseous product
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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
- F25J3/04151—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
- F25J3/0423—Subcooling of liquid process streams
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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
- F25J3/04309—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 nitrogen
- F25J3/04315—Lowest pressure or impure nitrogen, so-called waste nitrogen expansion
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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
- F25J3/04327—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 argon or argon enriched stream
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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
- F25J3/04351—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 nitrogen
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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
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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
- F25J3/04709—Producing crude argon in a crude argon column as an auxiliary column system in at least a dual pressure main column system
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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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/20—Processes or apparatus using separation by rectification in an elevated pressure multiple column system wherein the lowest pressure column is at a pressure well above the minimum pressure needed to overcome pressure drop to reject the products to atmosphere
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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
- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
- F25J2230/42—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being nitrogen
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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
- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
- F25J2230/52—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being oxygen enriched compared to air, e.g. "crude oxygen"
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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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream
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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
- F25J2245/42—Processes or apparatus involving steps for recycling of process streams the recycled stream being nitrogen
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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
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
- F25J2250/40—One 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
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
- F25J2250/50—One fluid being oxygen
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S62/00—Refrigeration
- Y10S62/923—Inert gas
- Y10S62/924—Argon
Definitions
- the invention relates to a method for air separation by rectification, in which air is compressed, pre-cleaned, cooled and pre-separated in the pressure stage of a two-stage rectification into a nitrogen-rich fraction and an oxygen-rich liquid, and the two fractions are at least partially fed to the medium-pressure stage of the rectification and in oxygen and nitrogen are broken down, at least one gaseous nitrogen fraction being led out, heated and at least partially relaxed in a work-performing manner.
- the invention also relates to a device for carrying out the method.
- the object of the invention is to improve the economy of the method and the device of the type mentioned at the outset and, in particular, to provide process cooling in a particularly advantageous manner without restricting the further use of the gaseous nitrogen fraction.
- This object is achieved in that at least part of the nitrogen which has been expanded to perform the work is heated and compressed again, at least part of the work obtained during the relaxation being used for the compression.
- the relaxed portion of the gaseous nitrogen fraction is compressed to a pressure which is substantially equal to the pressure when the gaseous nitrogen fraction is divided, and then subsequently fed back to the non-relaxed part of the gaseous nitrogen fraction becomes.
- the entire gaseous nitrogen fraction is also available under the (generally increased) pressure of the medium pressure stage in the type of cold generation according to the invention and can be used, for example, in the Combustion chamber of a coal gasification power plant can continue to be used.
- the invention also relates to a device for carrying out the method according to claims 5 and 6.
- Compressed and pre-cleaned air is introduced via line 1, cooled in a main heat exchanger 17 in indirect heat exchange with product streams and fed into pressure stage 3 of a two-stage rectification column 2.
- the pressure level 3 (operating pressure: 6 to 20 bar, preferably 8 to 17 bar) is with the medium pressure level 4 (operating pressure: 1.5 to 10 bar, preferably 2.0 to 8.0 bar) via a common condenser / evaporator 13 in heat exchanging connection.
- the introduced air is pre-divided in pressure stage 3 into nitrogen and into an oxygen-enriched fraction.
- the oxygen-enriched fraction is discharged in the liquid state via line 6, subcooled in heat exchanger 32 and throttled into the medium pressure stage 4.
- Nitrogen from the top of pressure stage 3 is also drawn off in liquid form via line 5, supercooled in heat exchanger 32 and partly discharged as a liquid product via line 8.
- the other part of the nitrogen from the pressure stage 3 is fed via line 9 as a return to the medium pressure stage 4.
- liquid oxygen (line 14), gaseous pure nitrogen (line 15) and impure nitrogen (line 16) are removed and the nitrogen streams in the main heat exchanger 17 are additionally heated in the heat exchanger 32.
- part (line 21) of the air in line 1 can be condensed in heat exchange 20 with oxygen 14 from the bottom of medium pressure stage 4.
- the liquid 14 from the sump of the medium pressure stage 4 is brought to high pressure by means of a pump 19 and partially evaporated during the heat exchange in the condenser 20.
- the partially condensed air 22 is introduced into the pressure stage 3 above the first feed point (line 1).
- the vaporized portion of the oxygen is removed via line 23 and warmed (17). Another part of the oxygen is withdrawn via line 42 as a liquid product stream.
- part of the impure nitrogen in line 16 is drawn off from the main heat exchanger 17 via line 30 at an average temperature of approximately 110 to 210 K, preferably 135 to 185 K, and in a pressure-reducing turbine 31 to perform a pressure of 2.6 to 1 , 4 bar, preferably about 2.0 bar relaxed.
- the expanded nitrogen is again conducted via line 32 to the cold end of the main heat exchanger 17 and warmed to approximately ambient temperature. He releases the cold obtained during relaxation to air to be separated in line 1.
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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)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19890113815 EP0383994A3 (fr) | 1989-02-23 | 1989-07-26 | Procédé et dispositif de rectification d'air |
CN90100335A CN1025068C (zh) | 1989-02-23 | 1990-01-23 | 通过精馏来分离空气的方法和装置 |
AU49960/90A AU618659B2 (en) | 1989-02-23 | 1990-02-21 | Process and apparatus for air fractionation by rectification |
US07/483,143 US5036672A (en) | 1989-02-23 | 1990-02-22 | Process and apparatus for air fractionation by rectification |
JP2042309A JPH02245201A (ja) | 1989-02-23 | 1990-02-22 | 精溜によって空気を分解する方法及び装置 |
EP90103572A EP0384483B1 (fr) | 1989-02-23 | 1990-02-23 | Procédé et dispositif de rectification d'air |
DE9090103572T DE59000211D1 (de) | 1989-02-23 | 1990-02-23 | Verfahren und vorrichtung zur luftzerlegung durch rektifikation. |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19893905521 DE3905521A1 (de) | 1989-02-23 | 1989-02-23 | Verfahren und vorrichtung zur luftzerlegung durch rektifikation |
DE3905521 | 1989-02-23 | ||
EP19890113815 EP0383994A3 (fr) | 1989-02-23 | 1989-07-26 | Procédé et dispositif de rectification d'air |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0383994A2 true EP0383994A2 (fr) | 1990-08-29 |
EP0383994A3 EP0383994A3 (fr) | 1990-11-07 |
Family
ID=25878076
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890113815 Withdrawn EP0383994A3 (fr) | 1989-02-23 | 1989-07-26 | Procédé et dispositif de rectification d'air |
EP90103572A Expired - Lifetime EP0384483B1 (fr) | 1989-02-23 | 1990-02-23 | Procédé et dispositif de rectification d'air |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90103572A Expired - Lifetime EP0384483B1 (fr) | 1989-02-23 | 1990-02-23 | Procédé et dispositif de rectification d'air |
Country Status (6)
Country | Link |
---|---|
US (1) | US5036672A (fr) |
EP (2) | EP0383994A3 (fr) |
JP (1) | JPH02245201A (fr) |
CN (1) | CN1025068C (fr) |
AU (1) | AU618659B2 (fr) |
DE (1) | DE59000211D1 (fr) |
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EP0527501A1 (fr) * | 1991-08-14 | 1993-02-17 | Linde Aktiengesellschaft | Procédé et dispositif de rectification d'air |
EP0758733A2 (fr) * | 1995-08-11 | 1997-02-19 | Linde Aktiengesellschaft | Procédé de séparation d'air par rectification à basse température |
EP0766053A2 (fr) * | 1995-09-29 | 1997-04-02 | Praxair Technology, Inc. | Système de rectification cryogénique pour la production d'oxygène à double pureté |
CN104833174A (zh) * | 2015-05-26 | 2015-08-12 | 杭州杭氧股份有限公司 | 一种带压辅助氧塔低能耗生产带压低纯氧和高纯氧产品的装置及方法 |
CN105066587A (zh) * | 2015-09-16 | 2015-11-18 | 开封空分集团有限公司 | 深冷分离及生产低纯度氧、高纯度氧和氮的装置及方法 |
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FR2681416B1 (fr) * | 1991-09-13 | 1993-11-19 | Air Liquide | Procede de refroidissement d'un gaz dans une installation d'exploitation de gaz de l'air, et installation. |
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US5461872A (en) * | 1994-11-21 | 1995-10-31 | The Boc Group, Inc. | Air separation method and apparatus |
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US5878597A (en) * | 1998-04-14 | 1999-03-09 | Praxair Technology, Inc. | Cryogenic rectification system with serial liquid air feed |
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CN101886871B (zh) * | 2010-08-04 | 2012-08-08 | 四川空分设备(集团)有限责任公司 | 一种空气分离制取压力氧气的方法及装置 |
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WO2014154339A2 (fr) | 2013-03-26 | 2014-10-02 | Linde Aktiengesellschaft | Procédé de séparation d'air et installation de séparation d'air |
EP2784420A1 (fr) | 2013-03-26 | 2014-10-01 | Linde Aktiengesellschaft | Procédé de séparation de l'air et installation de séparation de l'air |
EP2801777A1 (fr) | 2013-05-08 | 2014-11-12 | Linde Aktiengesellschaft | Installation de décomposition de l'air dotée d'un entraînement de compresseur principal |
DE102013017590A1 (de) | 2013-10-22 | 2014-01-02 | Linde Aktiengesellschaft | Verfahren zur Gewinnung eines Krypton und Xenon enthaltenden Fluids und hierfür eingerichtete Luftzerlegungsanlage |
EP2963367A1 (fr) | 2014-07-05 | 2016-01-06 | Linde Aktiengesellschaft | Procédé et dispositif cryogéniques de séparation d'air avec consommation d'énergie variable |
PL2963370T3 (pl) | 2014-07-05 | 2018-11-30 | Linde Aktiengesellschaft | Sposób i urządzenie do kriogenicznego rozdziału powietrza |
EP2963371B1 (fr) | 2014-07-05 | 2018-05-02 | Linde Aktiengesellschaft | Procede et dispositif de production d'un produit de gaz sous pression par decomposition a basse temperature d'air |
EP2963369B1 (fr) | 2014-07-05 | 2018-05-02 | Linde Aktiengesellschaft | Procede et dispositif cryogeniques de separation d'air |
EP3179186A1 (fr) * | 2015-12-07 | 2017-06-14 | Linde Aktiengesellschaft | Procede de production d'un produit comprime riche en oxygene, gazeux et liquide dans une installation de decomposition de l'air et installation de decomposition de l'air |
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EP0316768A2 (fr) * | 1987-11-13 | 1989-05-24 | Linde Aktiengesellschaft | Procédé de séparation d'air par rectification à basse température |
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DE3531307A1 (de) * | 1985-09-02 | 1987-03-05 | Linde Ag | Verfahren zur abtrennung von c(pfeil abwaerts)2(pfeil abwaerts)(pfeil abwaerts)+(pfeil abwaerts)-kohlenwasserstoffen aus erdgas |
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- 1989-07-26 EP EP19890113815 patent/EP0383994A3/fr not_active Withdrawn
-
1990
- 1990-01-23 CN CN90100335A patent/CN1025068C/zh not_active Expired - Fee Related
- 1990-02-21 AU AU49960/90A patent/AU618659B2/en not_active Ceased
- 1990-02-22 JP JP2042309A patent/JPH02245201A/ja active Pending
- 1990-02-22 US US07/483,143 patent/US5036672A/en not_active Expired - Fee Related
- 1990-02-23 DE DE9090103572T patent/DE59000211D1/de not_active Expired - Fee Related
- 1990-02-23 EP EP90103572A patent/EP0384483B1/fr not_active Expired - Lifetime
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US2666303A (en) * | 1950-06-08 | 1954-01-19 | British Oxygen Co Ltd | Apparatus for the separation of gas mixtures by liquefaction and rectification |
DE2548222B1 (de) * | 1975-10-28 | 1977-01-27 | Linde Ag | Verfahren und Vorrichtung zur Luftzerlegung |
EP0316768A2 (fr) * | 1987-11-13 | 1989-05-24 | Linde Aktiengesellschaft | Procédé de séparation d'air par rectification à basse température |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0527501A1 (fr) * | 1991-08-14 | 1993-02-17 | Linde Aktiengesellschaft | Procédé et dispositif de rectification d'air |
EP0758733A2 (fr) * | 1995-08-11 | 1997-02-19 | Linde Aktiengesellschaft | Procédé de séparation d'air par rectification à basse température |
EP0758733A3 (fr) * | 1995-08-11 | 1997-07-30 | Linde Ag | Procédé de séparation d'air par rectification à basse température |
EP0766053A2 (fr) * | 1995-09-29 | 1997-04-02 | Praxair Technology, Inc. | Système de rectification cryogénique pour la production d'oxygène à double pureté |
EP0766053A3 (fr) * | 1995-09-29 | 1998-01-14 | Praxair Technology, Inc. | Système de rectification cryogénique pour la production d'oxygène à double pureté |
CN104833174A (zh) * | 2015-05-26 | 2015-08-12 | 杭州杭氧股份有限公司 | 一种带压辅助氧塔低能耗生产带压低纯氧和高纯氧产品的装置及方法 |
CN105066587A (zh) * | 2015-09-16 | 2015-11-18 | 开封空分集团有限公司 | 深冷分离及生产低纯度氧、高纯度氧和氮的装置及方法 |
Also Published As
Publication number | Publication date |
---|---|
US5036672A (en) | 1991-08-06 |
CN1025068C (zh) | 1994-06-15 |
EP0384483B1 (fr) | 1992-07-22 |
CN1045173A (zh) | 1990-09-05 |
EP0384483A3 (en) | 1990-11-07 |
DE59000211D1 (de) | 1992-08-27 |
AU618659B2 (en) | 1992-01-02 |
AU4996090A (en) | 1990-08-30 |
EP0383994A3 (fr) | 1990-11-07 |
JPH02245201A (ja) | 1990-10-01 |
EP0384483A2 (fr) | 1990-08-29 |
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