JPS54116385A - Total low pressure system air separating method and equipment - Google Patents

Total low pressure system air separating method and equipment

Info

Publication number
JPS54116385A
JPS54116385A JP2352478A JP2352478A JPS54116385A JP S54116385 A JPS54116385 A JP S54116385A JP 2352478 A JP2352478 A JP 2352478A JP 2352478 A JP2352478 A JP 2352478A JP S54116385 A JPS54116385 A JP S54116385A
Authority
JP
Japan
Prior art keywords
supplied
piping
vol
gas
tower
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.)
Granted
Application number
JP2352478A
Other languages
Japanese (ja)
Other versions
JPS6044587B2 (en
Inventor
Takeo Komuro
Norio Nakazato
Yukiyoshi Yoshimatsu
Seiichi Yoshikawa
Yukiya Hiratsuka
Masahiro Yamazaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2352478A priority Critical patent/JPS6044587B2/en
Publication of JPS54116385A publication Critical patent/JPS54116385A/en
Publication of JPS6044587B2 publication Critical patent/JPS6044587B2/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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

Landscapes

  • 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

PURPOSE:To enhance air rectifying separation efficiency and Ar yield by cooling raw air with a gas from an expansion turbine and regulating the vol. of the gas supplied to the middle of the upper tower of a duplex rectifying tower in accordance with the vol. of product O2 and Ar drawn out, to raise the L/V value at the middle of the upper tower. CONSTITUTION:Raw air is compressed with compressor 12, cooled with change- over type heat exchanger 11, and divided into two parts. One part is supplied to the lower part of lower tower 1 of the duplex rectifying tower through heat exchanger 9. The other part is supplied to expansion turbine 7 through piping 131, and part or all of the gas from the outlet of turbine 7 is introduced into exchanger 9 through regulation valve 10 and piping 134, 135, and released into the air from piping 138. The residual gas is supplied to the middle of upper tower 3 through valve 10 and piping 133, and the vol. of the gas supplied is regulated in accordance with the vol. of product O2 and crude Ar drawn out.
JP2352478A 1978-03-03 1978-03-03 Totally low pressure air separation method and device Expired JPS6044587B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2352478A JPS6044587B2 (en) 1978-03-03 1978-03-03 Totally low pressure air separation method and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2352478A JPS6044587B2 (en) 1978-03-03 1978-03-03 Totally low pressure air separation method and device

Publications (2)

Publication Number Publication Date
JPS54116385A true JPS54116385A (en) 1979-09-10
JPS6044587B2 JPS6044587B2 (en) 1985-10-04

Family

ID=12112824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2352478A Expired JPS6044587B2 (en) 1978-03-03 1978-03-03 Totally low pressure air separation method and device

Country Status (1)

Country Link
JP (1) JPS6044587B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61256174A (en) * 1985-05-07 1986-11-13 株式会社日立製作所 Method of controlling air separator sampling argon
JPH029278B2 (en) * 1984-09-28 1990-03-01 Hitachi Ltd
WO2021230912A1 (en) * 2020-05-11 2021-11-18 Praxair Technology, Inc. System and method for recovery of nitrogen, argon, and oxygen in moderate pressure cryogenic air separation unit
US11629913B2 (en) 2020-05-15 2023-04-18 Praxair Technology, Inc. Integrated nitrogen liquefier for a nitrogen and argon producing cryogenic air separation unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11799128B2 (en) 2018-06-13 2023-10-24 Mitsubishi Gas Chemical Company, Inc. LGPS-based solid electrolyte and production method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH029278B2 (en) * 1984-09-28 1990-03-01 Hitachi Ltd
JPS61256174A (en) * 1985-05-07 1986-11-13 株式会社日立製作所 Method of controlling air separator sampling argon
JPH029279B2 (en) * 1985-05-07 1990-03-01 Hitachi Ltd
WO2021230912A1 (en) * 2020-05-11 2021-11-18 Praxair Technology, Inc. System and method for recovery of nitrogen, argon, and oxygen in moderate pressure cryogenic air separation unit
US11933538B2 (en) 2020-05-11 2024-03-19 Praxair Technology, Inc. System and method for recovery of nitrogen, argon, and oxygen in moderate pressure cryogenic air separation unit
US11629913B2 (en) 2020-05-15 2023-04-18 Praxair Technology, Inc. Integrated nitrogen liquefier for a nitrogen and argon producing cryogenic air separation unit

Also Published As

Publication number Publication date
JPS6044587B2 (en) 1985-10-04

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