JP6738126B2 - 空気分離装置 - Google Patents
空気分離装置 Download PDFInfo
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- JP6738126B2 JP6738126B2 JP2015019221A JP2015019221A JP6738126B2 JP 6738126 B2 JP6738126 B2 JP 6738126B2 JP 2015019221 A JP2015019221 A JP 2015019221A JP 2015019221 A JP2015019221 A JP 2015019221A JP 6738126 B2 JP6738126 B2 JP 6738126B2
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- 238000000926 separation method Methods 0.000 title claims description 69
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 326
- 229910052757 nitrogen Inorganic materials 0.000 claims description 134
- 239000007788 liquid Substances 0.000 claims description 106
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 58
- 229910052760 oxygen Inorganic materials 0.000 claims description 36
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 32
- 239000001301 oxygen Substances 0.000 claims description 32
- 238000011084 recovery Methods 0.000 claims description 31
- 239000002994 raw material Substances 0.000 claims description 24
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 22
- 238000009835 boiling Methods 0.000 claims description 19
- 229910001882 dioxygen Inorganic materials 0.000 claims description 18
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 12
- 238000001816 cooling Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000012530 fluid Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
- F25J3/04084—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 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
- F25J3/04284—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
- F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
- F25J3/04563—Integration with a nitrogen consuming unit, e.g. for purging, inerting, cooling or heating
- F25J3/04575—Integration with a nitrogen consuming unit, e.g. for purging, inerting, cooling or heating for a gas expansion plant, e.g. dilution of the combustion gas in a gas turbine
- F25J3/04581—Hot gas expansion of indirect heated nitrogen
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Separation By Low-Temperature Treatments (AREA)
Description
y≦−0.0392×x+4.0196 ・・・(1)
y≦−0.0392×x+4.0196 ・・・(1)
y=−0.0392×x+4.0196 ・・・(a)
2 空気圧縮機
3a、3b 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 冷却設備
9 膨張タービン
11 液体窒素昇圧用ポンプ
12 動力回収用タービン
13 熱交換器
L1 第1経路
L1b 第1経路L1の分岐路
L2 経路
L5 第2経路
L8 経路
L10 経路
L11 第3経路
Claims (6)
- 原料空気を圧縮する空気圧縮機と、
前記空気圧縮機で圧縮された圧縮空気を用いて熱交換する主熱交換器と、
前記主熱交換器を経た圧縮空気から少なくとも酸素を分離する高圧精留塔および低圧精留塔を備える精留塔と、
前記空気圧縮機で圧縮された圧縮空気を、前記主熱交換器を介して前記高圧精留塔へ供給する第1経路と、
前記低圧精留塔から酸素ガスを抜き出し、前記主熱交換器を介して酸素ガスを回収する第2経路と
を有する空気分離装置において、
前記高圧精留塔から液体窒素を抜き出し、前記主熱交換器を介して窒素ガスを回収する第3経路を備え、
前記第3経路には、前記高圧精留塔より下流側で前記主熱交換器より上流側に、前記圧縮空気の沸点より高い沸点となる窒素の飽和圧力以上に前記液体窒素を昇圧する液体窒素昇圧用ポンプが設けられており、
前記液体窒素昇圧用ポンプで昇圧された液体窒素の圧力は600kPaG以上であり、
前記主熱交換器では、前記液体窒素昇圧用ポンプで昇圧された液体窒素と前記空気圧縮機で圧縮された圧縮空気との間で熱交換が行われ、
前記液体窒素昇圧用ポンプで昇圧された液体窒素の圧力をx(MPaG)、
前記空気圧縮機に供給された原料空気の流量(Nm3/時間)に対する前記液体窒素昇圧用ポンプで昇圧された液体窒素の流量(Nm3/時間)の割合をy(%)としたとき、
前記圧力xと前記割合yが下記式(1)の関係を満足することを特徴とする空気分離装置。
y≦−0.0392×x+4.0196 ・・・(1) - 前記主熱交換器に供給する圧縮空気の圧力は500kPaG以下であり、前記液体窒素昇圧用ポンプで昇圧された液体窒素の圧力は600〜3500kPaGである請求項1に記載の空気分離装置。
- 前記第3経路は、前記主熱交換器を介して動力回収用タービンに接続されている請求項1または2に記載の空気分離装置。
- 前記動力回収用タービンの軸端を、前記空気圧縮機、該空気圧縮機とは別の圧縮機、または発電機の軸端に接続する請求項3に記載の空気分離装置。
- 前記第3経路には、前記主熱交換器より下流側で前記動力回収用タービンより上流側に熱交換器が設けられている請求項3または4に記載の空気分離装置。
- 前記空気圧縮機で圧縮された原料空気の圧力は300〜500kPaGであり、前記液体窒素昇圧用ポンプで昇圧された液体窒素の圧力は600〜3500kPaGである請求項1〜5のいずれかに記載の空気分離装置。
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JP2016142462A JP2016142462A (ja) | 2016-08-08 |
JP6738126B2 true JP6738126B2 (ja) | 2020-08-12 |
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JP7358184B2 (ja) * | 2019-10-11 | 2023-10-10 | エア・ウォーター・エンジニアリング株式会社 | 空気分離装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US5148680A (en) * | 1990-06-27 | 1992-09-22 | Union Carbide Industrial Gases Technology Corporation | Cryogenic air separation system with dual product side condenser |
US5355682A (en) * | 1993-09-15 | 1994-10-18 | Air Products And Chemicals, Inc. | Cryogenic air separation process producing elevated pressure nitrogen by pumped liquid nitrogen |
JP3737612B2 (ja) * | 1997-08-12 | 2006-01-18 | 大陽日酸株式会社 | 低純度酸素の製造方法及び装置 |
DE10021081A1 (de) * | 2000-04-28 | 2002-01-03 | Linde Ag | Verfahren und Vorrichtung zum Wärmeaustausch |
US7272954B2 (en) * | 2004-07-14 | 2007-09-25 | L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Proceded Georges Claude | Low temperature air separation process for producing pressurized gaseous product |
JP4206083B2 (ja) * | 2005-06-20 | 2009-01-07 | 神鋼エア・ウォーター・クライオプラント株式会社 | 深冷空気分離装置によるアルゴン製造方法 |
JP5307055B2 (ja) * | 2010-03-04 | 2013-10-02 | 大陽日酸株式会社 | 窒素及び酸素の製造方法並びに窒素及び酸素の製造装置。 |
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