JP5997105B2 - 空気分離方法 - Google Patents
空気分離方法 Download PDFInfo
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- JP5997105B2 JP5997105B2 JP2013119277A JP2013119277A JP5997105B2 JP 5997105 B2 JP5997105 B2 JP 5997105B2 JP 2013119277 A JP2013119277 A JP 2013119277A JP 2013119277 A JP2013119277 A JP 2013119277A JP 5997105 B2 JP5997105 B2 JP 5997105B2
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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
- F25J3/04406—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
- F25J3/04436—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 at least a triple pressure main column system
- F25J3/04454—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 at least a triple pressure main column system a main column system not otherwise provided, e.g. serially coupling of columns or more than three pressure levels
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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
- F25J2200/34—Processes or apparatus using separation by rectification using a side column fed by a stream from the low 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
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/02—Mixing or blending of fluids to yield a certain 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
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/50—Oxygen or special cases, e.g. isotope-mixtures or low purity O2
- F25J2215/52—Oxygen production with multiple purity O2
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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
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/50—Oxygen or special cases, e.g. isotope-mixtures or low purity O2
- F25J2215/54—Oxygen production with multiple pressure O2
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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
- F25J2235/50—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being 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
- 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
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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
- F25J2245/50—Processes or apparatus involving steps for recycling of process streams the recycled stream being 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
- 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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- 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)
- Oxygen, Ozone, And Oxides In General (AREA)
Description
前記低圧精留塔から液体酸素が導入されかつ熱交換部が設けられた容器を備え、
前記熱交換部は前記液体酸素を用いて熱交換を行うことによりガス酸素を生成し、
前記容器内の前記液体酸素と前記ガス酸素とを前記主熱交換器にそれぞれ供給する液体酸素供給ライン及びガス酸素供給ラインをさらに備えたことを要旨とする。
以下、図面に示した実施の形態に基づいて本発明を詳細に説明する。
図1は本発明の第1実施形態に係る空気分離装置1の全体構成を示すブロック図である。
図2は本発明の第2実施形態に係る空気分離装置1aの全体構成を示すブロック図である。図2の空気分離装置1aの構成が図1の空気分離装置1と異なるところは、供給ラインL4の代わりに、供給ライン(空気供給ライン)L7が設けられている点であり、その他の構成は同じである。以下、詳しく説明する。
図3は本発明の第3実施形態に係る空気分離装置1bの全体構成を示すブロック図である。図3の空気分離装置1bの構成が図1の空気分離装置1と異なるところは、空気凝縮器容器10内において空気凝縮器10aの上方に精留パッキン11が設けられている点であり、その他の構成は同じである。
図4は本発明の第4実施形態に係る空気分離装置1cの全体構成を示すブロック図である。図4の空気分離装置1cの構成が図2の空気分離装置1aと異なるところは、空気凝縮器容器10内において空気凝縮器10aの上方に精留パッキン11が設けられている点であり、その他の構成は同じである。
図5は本発明の第5実施形態に係る空気分離装置1dの全体構成を示すブロック図である。図5の空気分離装置1dの構成が図4の空気分離装置1cと異なるところは、供給ラインL3に液酸移送ポンプ12が設けられている点、及び戻しラインL12と該戻しラインL12の途中にバルブvaとが設けられている点であり、その他の構成は同じである。
上でも述べたが、空気分離装置1において空気凝縮器容器10から取り出す全体酸素量(純酸素)に占める液体酸素(純酸素)の取り出す比率を20%に固定し、ガス酸素の純度を変えた場合の空気凝縮器容器10内の液体酸素の純度等を特定した(表1参照)。
図3の空気分離装置1bにおいて、空気凝縮器容器10から取り出す全体酸素量(純酸素)に占める液体酸素(純酸素)の取り出す比率を20%に固定し、ガス酸素の純度を99.6%,95.0%,90.0%,80.0%,70.0%に変えた場合の空気凝縮器容器10内の液体酸素の純度等を特定した。特定結果を表2に示す。
図1の空気分離装置1において、ガス酸素純度を70%,80%,90%として、空気凝縮器容器10からの液体酸素の抜き出し量(取り出し比率)を変えた場合の空気圧縮機の吐出圧をそれぞれ算定した。算定結果を表3〜表5に示す。なお、表3がガス酸素純度70%のものであり、表4がガス酸素純度80%のものであり、表5がガス酸素純度90%のものである。また、各表において液体酸素抜き出し量は全酸素(純酸素)に対する割合であり、液体酸素抜き出し量が0%及び100%であるものは従来例(比較例)に相当する(以下、同じ)。
図3の空気分離装置1bにおいて、ガス酸素純度を70%,80%,90%として、空気凝縮器容器10からの液体酸素の抜き出し量(取り出し比率)を変えた場合の空気圧縮機の吐出圧をそれぞれ算定した。算定結果を表6〜表8に示す。なお、表6がガス酸素純度70%のものであり、表7がガス酸素純度80%のものであり、表8がガス酸素純度90%のものである。
2 空気圧縮機
3 吸着器
4 主熱交換器
5 高圧精留塔
6 低圧精留塔
6a 主凝縮器
7 保冷箱
8 昇圧圧縮機
9 液酸ポンプ
10 空気凝縮器容器
10a 空気凝縮器
11 精留パッキン
12 液酸移送ポンプ
va バルブ
L1〜L11 供給ライン
L12 戻しライン
Claims (4)
- 原料空気を圧縮する空気圧縮機と、
前記原料空気を用いて熱交換を行う主熱交換器と、
前記原料空気を酸素及び窒素に分離する高圧精留塔及び低圧精留塔と
を有する空気分離装置を用いて原料空気から酸素を回収する空気分離方法であって、
前記空気分離装置に備えられた前記高圧精留塔は1塔であり、
前記空気分離装置は、
前記低圧精留塔から液体酸素が導入されかつ熱交換部が設けられた容器、
前記容器内の熱交換部に空気又は昇圧空気を供給する空気供給ライン、
前記熱交換部で前記液体酸素と熱交換した空気を前記高圧精留塔に導入するラインを備え、
前記熱交換部は前記液体酸素を用いて熱交換を行うことによりガス酸素を生成し、前記容器内の前記液体酸素と前記ガス酸素とを前記主熱交換器にそれぞれ供給する液体酸素供給ライン及びガス酸素供給ラインをさらに備え、
前記容器内から取り出す前記液体酸素及び前記ガス酸素の量比率は、前記液体酸素の比率を10%以上80%以下とし、前記ガス酸素の比率を20%以上90%以下とし、
前記液体酸素供給ラインを介して高純度酸素を回収し、
前記ガス酸素供給ラインを介して前記高純度酸素よりも相対的に純度の低い低純度酸素を回収する
ことを特徴とする空気分離方法。 - 前記空気分離装置は、前記容器内で前記熱交換部の上方に精留パッキン又は精留皿が設けられた請求項1に記載の空気分離方法。
- 前記空気分離装置は、前記低圧精留塔から前記容器に液体酸素を供給する供給ラインと、該供給ラインに設けられ、前記低圧精留塔から前記容器に前記液体酸素を移送する液酸移送ポンプとを備えた請求項1または2に記載の空気分離方法。
- 前記空気分離装置は、前記容器内で蒸発した酸素の一部を前記低圧精留塔に戻す戻しラインと、該戻しラインの途中に設けられたバルブとを備えた請求項1〜3のいずれか1項に記載の空気分離方法。
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JP2013119277A JP5997105B2 (ja) | 2013-06-05 | 2013-06-05 | 空気分離方法 |
KR20140028109A KR20140143081A (ko) | 2013-06-05 | 2014-03-11 | 공기분리장치 |
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KR101977500B1 (ko) * | 2017-12-05 | 2019-05-10 | 주식회사 포스코 | 공기분리설비 |
JP7458226B2 (ja) | 2020-03-31 | 2024-03-29 | 大陽日酸株式会社 | 空気分離装置及び酸素ガス製造方法 |
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US5546767A (en) * | 1995-09-29 | 1996-08-20 | Praxair Technology, Inc. | Cryogenic rectification system for producing dual purity oxygen |
US5916262A (en) * | 1998-09-08 | 1999-06-29 | Praxair Technology, Inc. | Cryogenic rectification system for producing low purity oxygen and high purity oxygen |
FR2972794B1 (fr) * | 2011-03-18 | 2015-11-06 | Air Liquide | Appareil et procede de separation d'air par distillation cryogenique |
CN103998883B (zh) * | 2011-09-20 | 2016-12-14 | 林德股份公司 | 低温分离空气的方法和设备 |
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