JP2685483B2 - 空気分離装置 - Google Patents

空気分離装置

Info

Publication number
JP2685483B2
JP2685483B2 JP63087154A JP8715488A JP2685483B2 JP 2685483 B2 JP2685483 B2 JP 2685483B2 JP 63087154 A JP63087154 A JP 63087154A JP 8715488 A JP8715488 A JP 8715488A JP 2685483 B2 JP2685483 B2 JP 2685483B2
Authority
JP
Japan
Prior art keywords
air
heat exchanger
raw material
compressor
column
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.)
Expired - Fee Related
Application number
JP63087154A
Other languages
English (en)
Other versions
JPH01260283A (ja
Inventor
純一 細川
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 JP63087154A priority Critical patent/JP2685483B2/ja
Publication of JPH01260283A publication Critical patent/JPH01260283A/ja
Application granted granted Critical
Publication of JP2685483B2 publication Critical patent/JP2685483B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F25J3/04151—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
    • F25J3/04218—Parallel arrangement of the main heat exchange line in cores having different functions, e.g. in low pressure and high pressure cores
    • 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
    • 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
    • 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
    • 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

Landscapes

  • 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)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は空気分離装置に係り、特に液体酸素を気化さ
せるガスの昇圧に好適な空気分離装置に関するものであ
る。
〔従来の技術〕
従来の空気分離装置は、精留塔より抜き出された液体
酸素をポンプで昇圧後、熱交換器に供給し該熱交換器で
液体酸素を蒸発するために、空気等のガスを、昇圧機で
所定の圧力まで昇圧していた。
即ち、ポンプで昇圧された液体酸素の沸点が上昇する
ため、これを蒸発させる空気等のガスも空気分離装置の
運転圧力以上に昇圧する必要があった。なお、この種の
装置として関連するものには例えば特開昭56−80681号
が挙げられる。
〔発明が解決しようとする課題〕
上記従来技術は昇圧機の消費動力が大きくなることに
ついて配慮がされておらず、空気等のガスの昇圧を電動
機で駆動する昇圧機で行っていたため、空気等のガスの
昇圧に要する消費動力が大きくなっていた。
本発明の目的は、前記空気等のガスの昇圧に必要な消
費動力を低減する空気分離装置を提供することにある。
〔課題を解決するための手段〕
上記目的は、膨張タービンを駆動源とする圧縮機を設
け、該圧縮機により空気等のガスを昇圧することによ
り、達成される。
〔作用〕
従来の膨張タービンは空気分離装置の寒冷発生のた
め、空気を断熱膨張させる一方で、この寒冷相当の動力
を回収している。この動力回収は空気分離装置を運転す
るために必然的に行われているものである。本発明は膨
張タービンの回収動力を駆動源として、圧縮機を稼動さ
せ該圧縮機により空気等のガスの昇圧を行ない、所定圧
力まで昇圧するのに必要な消費動力を低減することがで
きる。
〔実 施 例〕
以下、本発明の一実施例を第１図により説明する。
図において、原料空気の一部は空気熱交換器１で冷却
され精留塔６に送気され、製品である酸素と廃窒素とに
精留分離される。精留塔６は原料空気が塔底部に供給さ
れる高圧の下塔と、塔頂部に廃窒素を発生する低圧の下
塔とからなり、液体酸素は上塔と下塔との結合部分に得
られる。空気熱交換器１に送気された原料空気の一部は
空気熱交換器１より中間抽出（気）され、膨張タービン
３にて断熱膨張され、寒冷を発生し、この寒冷は精留塔
６の上塔側に供給される。一方酸素は液状で精留塔６よ
り抜き出され、ポンプ７にて昇圧後、酸素熱交換器５
で、空気昇圧機２および膨張タービン３で駆動される圧
縮機４で所定の圧力まで昇圧された空気と熱交換するこ
とにより、蒸発気化し後流に送気される。
本実施例によれば、膨張タービン３の回収動力も空気
の昇圧に有効に利用できるため、空気昇圧機２の消費動
力を低減できる効果がある。
本発明は酸素の蒸発媒体として空気に限定するもので
はなく、媒体として窒素等を用いる場合にも適用できる
ものである。
〔発明の効果〕
本発明によれば、酸素を蒸発，気化する空気等のガス
の昇圧に必要な動力を低減できるので、装置のランニン
グコストを低減できる効果がある。
【図面の簡単な説明】
第１図は本発明の一実施例の空気分離装置の系統図であ
る。 １……空気熱交換器、２……空気昇圧機、３……膨張タ
ービン、４……圧縮機、５……酸素熱交換器、６……精
留塔、７……ポンプ

Claims (1)

    (57)【特許請求の範囲】
  1. 【請求項１】上塔および下塔からなり、下塔底部に供給
    される原料空気から液体酸素と窒素とを分離して発生す
    る精留塔と、この精留塔から得られる窒素との熱交換に
    より原料空気を冷却する空気熱交換器と、この空気熱交
    換器の途中より抜き出された原料空気を断熱膨張して寒
    冷として上記精留塔の上塔に供給する膨張タービンと、
    この膨張タービンに連結された圧縮機とこの圧縮機と直
    列接続された他の圧縮機とからなり、上記空気熱交換器
    に供給される前の原料空気を圧縮する圧縮手段と、この
    圧縮手段から出力される原料空気との熱交換により上記
    液体酸素を気化させる酸素熱交換器とからなることを特
    徴とする空気分離装置。
JP63087154A 1988-04-11 1988-04-11 空気分離装置 Expired - Fee Related JP2685483B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63087154A JP2685483B2 (ja) 1988-04-11 1988-04-11 空気分離装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63087154A JP2685483B2 (ja) 1988-04-11 1988-04-11 空気分離装置

Publications (2)

Publication Number Publication Date
JPH01260283A JPH01260283A (ja) 1989-10-17
JP2685483B2 true JP2685483B2 (ja) 1997-12-03

Family

ID=13907067

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63087154A Expired - Fee Related JP2685483B2 (ja) 1988-04-11 1988-04-11 空気分離装置

Country Status (1)

Country Link
JP (1) JP2685483B2 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19529681C2 (de) * 1995-08-11 1997-05-28 Linde Ag Verfahren und Vorrichtung zur Luftzerlegung durch Tieftemperaturrektifikation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3216510A1 (de) * 1982-05-03 1983-11-03 Linde Ag, 6200 Wiesbaden Verfahren zur gewinnung von gasfoermigem sauerstoff unter erhoehtem druck
JPS6399483A (ja) * 1986-10-15 1988-04-30 株式会社日立製作所 空気分離装置

Also Published As

Publication number Publication date
JPH01260283A (ja) 1989-10-17

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