KR940002589A - Process for cryogenic distillation of air inlets - Google Patents

Process for cryogenic distillation of air inlets Download PDF

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Publication number
KR940002589A
KR940002589A KR1019930013420A KR930013420A KR940002589A KR 940002589 A KR940002589 A KR 940002589A KR 1019930013420 A KR1019930013420 A KR 1019930013420A KR 930013420 A KR930013420 A KR 930013420A KR 940002589 A KR940002589 A KR 940002589A
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South Korea
Prior art keywords
stream
air inlet
low pressure
column
nitrogen
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KR1019930013420A
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Korean (ko)
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월터 프루네스키 로렌스
아그래월 래커쉬
Original Assignee
윌리암 에프. 마쉬
에어 프로덕츠 앤드 케미칼스, 인코오포레이티드
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Publication of KR940002589A publication Critical patent/KR940002589A/en

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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
    • F25J3/04296—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
    • F25J3/04309—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
    • 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
    • F25J3/04248—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
    • 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
    • F25J3/04375—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
    • 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
    • F25J3/04642—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
    • 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
    • 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
    • F25J2200/50—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the column
    • F25J2200/52—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the column in the high pressure column of a double pressure main column system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • 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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  • 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

본 발명은 공기의 극저온 증류를 통해 대량의 액체 산물을 제조하는 공정에 관한 것이다. 특히, 본 발명은 공정의 에너지 효율성을 증가시키기 위한 개선에 관한 것으로, 종래 기술과 비교해서 상승된 압력으로 저압 증류 컬럼을 작동시키는 것을 포함한다.The present invention relates to a process for producing a large amount of liquid product via cryogenic distillation of air. In particular, the present invention relates to improvements to increase the energy efficiency of a process, including operating a low pressure distillation column at elevated pressures as compared to the prior art.

Description

공기 유입물의 극저온 증류를 위한 공정Process for cryogenic distillation of air inlets

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 공기의 극저온 증류를 통해 대량의 액체 산물을 제조하는 종래 공정의 개략도,1 is a schematic diagram of a conventional process for producing a large amount of liquid product through cryogenic distillation of air,

제2도는 본 발명을 따른 공정의 일실시예를 나타낸 개략도,2 is a schematic view showing one embodiment of a process according to the invention,

제3도는 본 발명을 따른 공정의 양호한 실시예를 나타낸 개략도이다.3 is a schematic view showing a preferred embodiment of the process according to the invention.

Claims (13)

고압 컬럼과 저압 컬럼을 구비하는 다중 컬럼 증류 시스템을 이용한 공기 유입물의 극저온 증류를 위한 공정에 있어서, 상기 공정이 공기 유입물의 적어도 15%를 액체 질소 산물 스트림 및/또는 액체 산소 산물 스트림으로서 제거하기에 충분한 냉동량을 발생시키고, 공기 유입물의 전방단부 프로세싱 후에 공기 유입물의 적어도 일부분은 공기 유입물이 고압 질소 오버헤드와 고압 천연 액체 산소 저층물로 정류되는 고압 컬럼에 주입되며, 고압 천연 액체 산소 저층물의 적어도 일부분은 고압 천연 액체 산소 저층물이 저압 질소 오버헤드와 저압 액체 산소 저층물로 증류되는 저압 컬럼에 주입되며, 고압 컬럼 및 저압 컬럼이 열적으로 연계되어서 고압 질소 오버헤드의 적어도 일부분이 기화용 저압 컬럼 산소-풍부 액체에 대한 제1의 재가열기/응축기 안에서 응축되며, 최종적으로, 응축된 고압 질소 오버헤드의 적어도 일부분이 증류 컬럼 시스템용 환류를 제공하기 위해 사용되고, 상기 공정의 효율성을 증가시키기 위한 개선점이 저압 컬럼을 25∼50psia의 압력으로 작동시키는 것을 포함하는 것을 특징으로 하는 공기 유입물의 극저온 증류를 위한 공정.A process for cryogenic distillation of an air inlet using a multi-column distillation system having a high pressure column and a low pressure column, wherein the process removes at least 15% of the air inlet as a liquid nitrogen product stream and / or a liquid oxygen product stream. After generating a sufficient freezing amount, at least a portion of the air inlet after the front end processing of the air inlet is injected into a high pressure column where the air inlet is rectified with a high pressure nitrogen overhead and a high pressure natural liquid oxygen bottoms, At least a portion is injected into a low pressure column where the high pressure natural liquid oxygen bottoms are distilled into a low pressure nitrogen overhead and a low pressure liquid oxygen bottoms, and the high pressure column and the low pressure column are thermally associated so that at least a portion of the high pressure nitrogen overheads is low pressure for vaporization. First reheater / condenser for column oxygen-rich liquid At least a portion of the condensed high pressure nitrogen overhead is used to provide reflux for the distillation column system, and an improvement to increase the efficiency of the process is to operate the low pressure column at a pressure of 25-50 psia. Cryogenic distillation of the air inlet, characterized in that it comprises a. 제1항에 있어서, 질소가 풍부한 가스상의 산물 스트림이 저압 컬럼으로 부터 배출되고, 상기 공정의 효율성을 증가시키기 위한 개선점이 팽창기 안에서 질소가 풍부한 가스상의 산물 스트림을 팽창시킴으로써 상기 냉동량의 제2부분을 발생시키는 것을 특징으로 하는 공기 유입물의 극저온 증류를 위한 공정.The second portion of the refrigeration amount according to claim 1, wherein the nitrogen-rich gaseous product stream exits the low pressure column and an improvement for increasing the efficiency of the process is achieved by expanding the nitrogen-rich gaseous product stream in the expander. Cryogenic distillation of the air inlet, characterized in that to generate a. 제1항에 있어서, 저압 질소 오버헤드의 적어도 일부분이 공정 스트림에 대한 간접적인 열교환에 의해 더워지고 추가의 프로세싱을 위해 상기 공정에 재순한되는 것을 특징으로 하는 공기 유입물의 극저온 증류를 위한 공정.The process of claim 1, wherein at least a portion of the low pressure nitrogen overhead is warmed by indirect heat exchange to the process stream and recycled to the process for further processing. 제3항에 있어서, 팽창기 구조가 공기 유입물의 전방단부 프로세싱을 포함하는 것을 특징으로 하는 공기 유입물의 극저온 증류를 위한 공정.4. The process of claim 3, wherein the expander structure comprises front end processing of the air inlet. 제3항에 있어서, 팽창기 구조가 저압 질수 오버헤드의 일부분의 추가 프로세싱을 포함하는 것을 특징으로 하는 공기 유입물의 극저온 증류를 위한 공정.4. The process of claim 3, wherein the expander structure includes further processing of a portion of the low pressure water overhead. 제4항에 있어서, 공기 유입물의 전방단부 프로세싱이, (a)공기 유입물을 상승된 압력까지 압축시키고, 극저 온으로 냉동될 공기 유입물로 부터 불순물을 제거시키고, (b)공정 스트림에 대한 간접적인 열교환에 의해 공기 유입물을 냉각시키고, (c)압축된 공기 유입물을 제1분리 주입 스트림과 제2분리 주입스트림으로 분리하고, (d)간접적인 열교환에 의해 공기 주입에 냉동을 제공하면서 온난한 팽창기안에서 제1주입 스트림을 팽창시키고 팽창된 제1분리 주입 스트림을 공기 유입물까지 재순환시키며, (e)공정 스트림에 대한 간접적인 열교환에 의해 제2분리 주입스트림을 추가로 냉각시키고, (f)제2분리 주입 스트림을 제3분리 주입 스트림과 제4분리 주입 스트림으로 추가로 분리하고, (g)간접적인 열교환에 의해 공기 유입물에 냉동을 제공하면서 냉각 팽창기를 통해 제3분리 주입 스트림을 팽창시키고 팽창된 제3분리 주입 스트림의 일부분을 공기 유입물까지 재순환시키고, (h)공정 스트림에 대한 간접적인 열교환에 의해 제4분리 주입 스트림을 추가로 냉각시키고, (i)제4분리 주입 스트림의 일부분을 정류시키기 위해 저압 컬럼내로 주입하며, (j)제4분리 주입 스트림의 나머지 부분과 팽창된 제3분리 주입 스트림의 나머지 부분을 정류시키기 위해 고압 컬럼내로 주입하는 것들을 포함하는 것을 특징으로 하는 공기 유입물의 극저온 증류를 위한 공정.The process of claim 4, wherein the front end processing of the air inlet comprises (a) compressing the air inlet to elevated pressure, removing impurities from the air inlet to be cryogenically frozen, and (b) treating the process stream. Cool the air inlet by indirect heat exchange, (c) separate the compressed air inlet into the first and second separate injection streams, and (d) provide refrigeration to the air injection by indirect heat exchange. While expanding the first injection stream in a warm inflator and recycling the expanded first separate injection stream to the air inlet, (e) further cooling the second separation injection stream by indirect heat exchange to the process stream, (f) further separating the second separation injection stream into a third separation injection stream and a fourth separation injection stream, and (g) cooling expansion while providing refrigeration to the air inlet by indirect heat exchange. Expand the third separation injection stream through the air and recycle a portion of the expanded third separation injection stream to the air inlet, (h) further cool the fourth separation injection stream by indirect heat exchange to the process stream, (i) injection into the low pressure column to rectify a portion of the fourth separation injection stream, and (j) injection into the high pressure column to rectify the remainder of the fourth separation injection stream and the remainder of the expanded third separation injection stream. A process for cryogenic distillation of an air inlet, characterized in that it comprises. 제6항에 있어서, 저압 질소 오버헤드의 일부분의 추가 프로세싱이 (a)질소를 상승된 압력까지 압축시키고, (b)질소를 공정 스트림에 대한 간접적인 열교환에 의해 이슬점 또는 그 근처의 온도까지 냉각시키고, (c)질소를 기화용 고압 천연 액체 질소 저층물에 대한 제2재가열기/응축기 안에서 응축시키며, (d)응측된 저압 질소 오버헤드를 증류 컬럼 시스템용 추가 환류 및/또는 액체 질소 산물 시스템의 적어도 일부분으로서 사용하는 것들을 포함하는 것을 특징으로 하는 공기 유입물의 극저온 증류를 위한 공정.The process of claim 6, wherein further processing of a portion of the low pressure nitrogen overhead comprises (a) compressing nitrogen to elevated pressure, and (b) cooling the nitrogen to a temperature near or near the dew point by indirect heat exchange to the process stream. (C) nitrogen is condensed in a second reheater / condenser for the high pressure natural liquid nitrogen bottoms for vaporization, and (d) the condensed low pressure nitrogen overheads are further refluxed and / or a liquid nitrogen product system for the distillation column system. Cryogenic distillation of an air inlet, characterized in that it comprises those used as at least a portion of. 제7항에 있어서, 패 스트림이 저압 컬럼의 상부 중간위치로 배출되고, 공정 스트림에 대한 간접적인 열교환에 의해 더워지며, 그후에 가스상의 폐산물로서 제거되는 것을 특징으로 하는 공기 유입물의 극저온 증류를 위한 공정.8. The cryogenic distillation of an air inlet according to claim 7, wherein the pad stream is discharged to the upper intermediate position of the low pressure column, warmed by indirect heat exchange with the process stream, and then removed as a gaseous waste product. fair. 제8항에 있어서, 저압 질소 오버헤드에 제2부분이 공정 스트림에 대한 간접적인 열교환에 의해 더워지고, 그후에 가스상의 질소 산물 스트림으로서 제거되는 것을 특징으로 하는 공기 유입물의 극저온 증류틀 위한 공정.9. The process of claim 8 wherein the second portion of the low pressure nitrogen overhead is warmed by indirect heat exchange to the process stream and then removed as a gaseous nitrogen product stream. 제9항에 있어서, 저압 액체 산소 저층물의 일부분이 액체 산소 산물 스트림으로서 제거되는 것을 특징으로 하는 공기 유입물의 극저온 증류를 위한 공정.10. The process of claim 9, wherein a portion of the low pressure liquid oxygen bottoms is removed as a liquid oxygen product stream. 제10항에 있어서, 저압 액체 산소 저층물의 일부분이 공정 스트림에 대한 간접적인 열교환에 의해 더워지고, 그후에 가스상의 산소 산물로서 제거되는 것을 특징으로 하는 공기 유입물의 극저온 증류를 위한 공정.The process for cryogenic distillation of an air inlet according to claim 10, wherein a portion of the low pressure liquid oxygen bottoms is heated by indirect heat exchange to the process stream and then removed as a gaseous oxygen product. 제11항에 있어서, 공정의 효율성을 증가시키기 위한 개선점이 공정 스트림에 대한 간접적인 열교환에 의해 페스트림을 온난화시키기 전에 제1팽창기 안에서 폐스트림을 팽창시키고/또는 공정 스트림에 대한 간접적인 열교환에 의해 저압 질소 오버헤드의 제2부분을 온난화시키기 전에 제2팽창기 안에서 저압 질소 오버헤드의 제2부분을 팽창시킴으로써 상기 냉동량의 제2부분을 발생시키는 것을 포함하는 것을 특징으로 하는 공기 유입물의 극저온 증류를 위한 공정.12. The method of claim 11, wherein an improvement to increase the efficiency of the process is to expand the waste stream in the first expander and / or by indirect heat exchange to the process stream before warming the ferstream by indirect heat exchange to the process stream. Cryogenic distillation of the air inlet comprising generating a second portion of the refrigeration amount by expanding the second portion of low pressure nitrogen overhead in a second expander prior to warming the second portion of low pressure nitrogen overhead. Process for you. 제12항에 있어서, (a)다중 증류 컬럼 시스템이 천연 아르곤 컬럼을 추가로 포함하고, (b)아르곤함유 가스 상측부 스트림이 저압 컬럼의 하부 중간 위치로 부터 제거되고, 아르곤함유 가스상 측부 스트림이 아르곤-풍부 증기 오버헤드와 아르곤-희박 저층물 액체로 정류되는 천연 아르곤 컬럼에 주입되며, (C)아르곤-희박 저층물 액체가 저압 컬럼에 회수되고, (d)아르곤-풍부 증기 오버헤드의 적어도 일부분이 기화용 고압 천연 액체 산소 저층물에 대한 제3재가열기/응축기 안에서 응축되고, (e)응축된 아르곤-풍부 증기 오버헤드의 일부분이 액체 아르곤 산물로서 제거되며, (f)응축된 아르곤-풍부 증기 오버헤드의 나머지 부분이 천연 아르곤 컬럼을 위한 환류를 제공하기 위해 사용되는 것을 특징으로 하는 공기 유입물의 극저온 증류를 위한 공정.13. The system of claim 12, wherein (a) the multiple distillation column system further comprises a natural argon column, (b) the argon-containing gas upper stream is removed from the lower intermediate position of the low pressure column and the argon-containing gas phase side stream is Injected into a natural argon column rectified with argon-rich vapor overhead and argon-lean bottoms liquid, (C) argon-lean bottoms liquid is recovered to a low pressure column, and (d) at least of the argon-rich vapor overhead A portion is condensed in the third reheater / condenser for the high pressure natural liquid oxygen bottoms for vaporization, (e) a portion of the condensed argon-rich vapor overhead is removed as liquid argon product, and (f) condensed argon- Process for cryogenic distillation of an air inlet, wherein the remainder of the enriched vapor overhead is used to provide reflux for the natural argon column. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
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