JP2009299930A - 空気分離方法およびそれに用いる装置 - Google Patents
空気分離方法およびそれに用いる装置 Download PDFInfo
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- JP2009299930A JP2009299930A JP2008151993A JP2008151993A JP2009299930A JP 2009299930 A JP2009299930 A JP 2009299930A JP 2008151993 A JP2008151993 A JP 2008151993A JP 2008151993 A JP2008151993 A JP 2008151993A JP 2009299930 A JP2009299930 A JP 2009299930A
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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
- F25J3/04721—Producing pure argon, e.g. recovered from a crude argon 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
- F25J3/04151—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
- F25J3/04236—Integration of different exchangers in a single core, so-called integrated cores
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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
- F25J3/04254—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using the cold stored in external cryogenic fluids
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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
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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
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/42—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
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/50—Oxygen
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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
【解決手段】原料空気を高圧塔8に導入して深冷液化分離し酸素富化液体空気を底部に溜め窒素ガスを頂部から取り出す工程と、酸素富化液体空気を高圧塔8の底部から取り出して低圧塔9に導入する工程と、高圧塔8の頂部から取り出した窒素ガスを液化してその一部を高圧塔8の頂部に還流するとともに残部を低圧塔9の頂部に送給する工程と、低圧塔9に導入した酸素富化液体空気を深冷液化分離し酸素を低圧塔9の底部に溜めフィードアルゴンを低圧塔9から取り出し窒素ガスを低圧塔9の頂部から取り出す工程と、低圧塔9からフィードアルゴンを取り出して粗アルゴン塔31に導入する工程を備えた方法であって、原料空気の全部を高圧塔8に導入する工程と、低圧塔9に排ガスを大気中に放出することなく滞留させフィードアルゴン中のアルゴン含有量を増やす工程を備えている。
【選択図】図1
Description
実施例として、図1に示す空気分離装置を用い、比較例として、図5に示す従来例と同様構造の空気分離装置を用いた。両空気分離装置の運転条件に関しては、原料空気の供給先、低圧塔の精留棚の段数、高圧塔の精留棚の段数、原料空気流量(Nm3 /h)(Nは標準状態を示す。以下、同じ),製品ガス純度(%)の各条件を、下記の表1となるように設定した。
9 低圧塔
31 粗アルゴン塔
Claims (3)
- 外部より取り入れた空気を空気圧縮手段で圧縮する工程と、この空気圧縮手段により圧縮された原料空気中の不純分を除去手段で除去する工程と、この除去手段を経た原料空気を熱交換器で低温に冷却する工程と、この熱交換器を経た原料空気を高圧塔に導入しその各成分の沸点差を利用して深冷液化分離し酸素富化液体空気を底部に溜め窒素ガスを頂部から取り出す工程と、上記酸素富化液体空気を高圧塔の底部から取り出して低圧塔に導入する工程と、上記高圧塔の頂部から取り出した窒素ガスを液化手段に導入して液化しその一部を高圧塔の頂部に還流するとともに残部を低圧塔の頂部に送給する工程と、上記低圧塔に導入した酸素富化液体空気をその各成分の沸点差を利用して深冷液化分離し酸素を低圧塔の底部に溜めフィードアルゴンを低圧塔から取り出し窒素ガスを低圧塔の頂部から取り出す工程と、上記低圧塔の底部から酸素を液体状態および気体状態の少なくとも一方で取り出して製品酸素取出路に送給する工程と、上記低圧塔からフィードアルゴンを取り出してアルゴン精留手段に導入する工程と、上記低圧塔の頂部から窒素ガスを取り出して製品窒素取出路に送給する工程とを備えた方法であって、上記熱交換器を経た原料空気の全部を高圧塔に導入する工程と、上記低圧塔に、フィードアルゴンよりアルゴン含有量が少ない排ガスを大気中に放出することなく滞留させフィードアルゴン中のアルゴン含有量を増やす工程とを備えていることを特徴とする空気分離方法。
- 上記高圧塔内を流下する還流液を上記低圧塔に導入しないようにした請求項1記載の空気分離方法。
- 外部より取り入れた空気を圧縮する空気圧縮手段と、この空気圧縮手段により圧縮された原料空気中の不純分を除去する除去手段と、この除去手段を経た原料空気を低温に冷却する熱交換器と、この熱交換器を経た原料空気をその各成分の沸点差を利用して深冷液化分離し酸素富化液体空気を底部に溜め窒素ガスを頂部から取り出す高圧塔と、上記酸素富化液体空気を高圧塔の底部から取り出して低圧塔に導入する液体空気導入路と、上記高圧塔の頂部から取り出した窒素ガスを導入して液化しその一部を高圧塔の頂部に還流するとともに残部を低圧塔の頂部に送給する液化手段と、上記液体空気導入路により導入した酸素富化液体空気をその各成分の沸点差を利用して深冷液化分離し酸素を底部に溜めフィードアルゴンを取り出し窒素ガスを頂部から取り出す低圧塔と、上記低圧塔の底部から酸素を液体状態および気体状態の少なくとも一方で取り出して製品酸素取出路に送給する酸素送給路と、上記低圧塔からフィードアルゴンを取り出してアルゴン精留手段に導入するフィードアルゴン導入路と、上記低圧塔の頂部から窒素ガスを取り出して製品窒素取出路に送給する窒素送給路とを備え、上記熱交換器を経た原料空気の全部を高圧塔に導入し、上記低圧塔に、上記フィードアルゴンよりアルゴン含有量が少ない排ガスを大気中に放出することなく滞留させフィードアルゴン中のアルゴン含有量を増やすように構成したことを特徴とする空気分離装置。
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106225421A (zh) * | 2016-08-19 | 2016-12-14 | 浙江智海化工设备工程有限公司 | 一种回收氩冷量进行氧气液化装置 |
EP3916330A1 (en) * | 2020-12-08 | 2021-12-01 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for start-up of a cryogenic distillation air separation unit |
JP7329714B1 (ja) | 2023-04-28 | 2023-08-18 | 大陽日酸株式会社 | 窒素製造方法及び装置 |
JP7491716B2 (ja) | 2020-03-31 | 2024-05-28 | 大陽日酸株式会社 | 空気液化分離装置 |
Citations (8)
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JPS5542299B1 (ja) * | 1970-10-08 | 1980-10-29 | ||
JPS62276387A (ja) * | 1986-05-23 | 1987-12-01 | 株式会社神戸製鋼所 | アルゴンの製造方法 |
JPS63217184A (ja) * | 1987-03-05 | 1988-09-09 | 株式会社神戸製鋼所 | 空気分離方法 |
JPH02247484A (ja) * | 1988-12-01 | 1990-10-03 | Linde Ag | 空気分解方法及び装置 |
JPH0849968A (ja) * | 1994-08-09 | 1996-02-20 | Nippon Sanso Kk | 空気液化分離方法及び装置 |
JP2000055542A (ja) * | 1998-06-10 | 2000-02-25 | Air Prod And Chem Inc | 低温空気分離によるアルゴン製造方法 |
JP2005265392A (ja) * | 2004-03-22 | 2005-09-29 | Kobe Steel Ltd | 空気液化分離装置およびその運転方法 |
US20070199345A1 (en) * | 2004-09-02 | 2007-08-30 | Belanger Paul W | Cryogenic air separation plant with reduced liquid drain loss |
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2008
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Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5542299B1 (ja) * | 1970-10-08 | 1980-10-29 | ||
JPS62276387A (ja) * | 1986-05-23 | 1987-12-01 | 株式会社神戸製鋼所 | アルゴンの製造方法 |
JPS63217184A (ja) * | 1987-03-05 | 1988-09-09 | 株式会社神戸製鋼所 | 空気分離方法 |
JPH02247484A (ja) * | 1988-12-01 | 1990-10-03 | Linde Ag | 空気分解方法及び装置 |
JPH0849968A (ja) * | 1994-08-09 | 1996-02-20 | Nippon Sanso Kk | 空気液化分離方法及び装置 |
JP2000055542A (ja) * | 1998-06-10 | 2000-02-25 | Air Prod And Chem Inc | 低温空気分離によるアルゴン製造方法 |
JP2005265392A (ja) * | 2004-03-22 | 2005-09-29 | Kobe Steel Ltd | 空気液化分離装置およびその運転方法 |
US20070199345A1 (en) * | 2004-09-02 | 2007-08-30 | Belanger Paul W | Cryogenic air separation plant with reduced liquid drain loss |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106225421A (zh) * | 2016-08-19 | 2016-12-14 | 浙江智海化工设备工程有限公司 | 一种回收氩冷量进行氧气液化装置 |
JP7491716B2 (ja) | 2020-03-31 | 2024-05-28 | 大陽日酸株式会社 | 空気液化分離装置 |
EP3916330A1 (en) * | 2020-12-08 | 2021-12-01 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for start-up of a cryogenic distillation air separation unit |
JP7329714B1 (ja) | 2023-04-28 | 2023-08-18 | 大陽日酸株式会社 | 窒素製造方法及び装置 |
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