JP4287771B2 - 空気液化分離装置およびその運転方法 - Google Patents
空気液化分離装置およびその運転方法 Download PDFInfo
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- JP4287771B2 JP4287771B2 JP2004083165A JP2004083165A JP4287771B2 JP 4287771 B2 JP4287771 B2 JP 4287771B2 JP 2004083165 A JP2004083165 A JP 2004083165A JP 2004083165 A JP2004083165 A JP 2004083165A JP 4287771 B2 JP4287771 B2 JP 4287771B2
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- 238000000926 separation method Methods 0.000 title claims description 105
- 238000000034 method Methods 0.000 title claims description 8
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 131
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 109
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 104
- 239000001301 oxygen Substances 0.000 claims description 104
- 229910052760 oxygen Inorganic materials 0.000 claims description 104
- 239000007788 liquid Substances 0.000 claims description 92
- 229910052757 nitrogen Inorganic materials 0.000 claims description 46
- 239000002994 raw material Substances 0.000 claims description 43
- 239000012535 impurity Substances 0.000 claims description 33
- 229910001882 dioxygen Inorganic materials 0.000 claims description 24
- 230000007423 decrease Effects 0.000 claims description 10
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000011017 operating method Methods 0.000 claims description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 52
- 239000000047 product Substances 0.000 description 44
- 229910052786 argon Inorganic materials 0.000 description 26
- 229910001873 dinitrogen Inorganic materials 0.000 description 17
- 238000010586 diagram Methods 0.000 description 12
- 239000007789 gas Substances 0.000 description 8
- 230000009897 systematic effect Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000012263 liquid product Substances 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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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
- F25J3/04218—Parallel arrangement of the main heat exchange line in cores having different functions, e.g. in low pressure and high pressure 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
- F25J3/04284—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
- F25J3/04472—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages
- F25J3/04496—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist
- F25J3/04503—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems
- F25J3/04509—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems within the cold part of the air fractionation, i.e. exchanging "cold" within the fractionation and/or main heat exchange line
- F25J3/04515—Simultaneously changing air feed and products output
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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
- F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
- F25J3/04527—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general
- F25J3/04551—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the metal production
- F25J3/04557—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the metal production for pig iron or steel making, e.g. blast furnace, Corex
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Separation By Low-Temperature Treatments (AREA)
Description
(1) 平均需要量で装置を計画し、ガスホルダーによって調整する。
(2) 最大需要量を発生する装置を計画し、需要が少ないときには余剰分を液体製品等にして他の販売に向ける。
(3) 需要量の少ないときの発生量で装置を計画し、需要が多いときには予め貯蔵しておいた液体製品を気化させて使用する。
しかしながら、(1)の手段では、非常に高価で多大な設置スペースを要するガスホルダーを必要とするため装置が過大となる。また、(2)の手段では、液体製品製造のための高圧装置が必要である。さらに、(3)の手段では製品ガスよりも製造コストの高い液体製品を使用しなければならない。つまり、上記のような手段の何れを採用したとしても、コスト増を招くという経済上の欠点があった。
複式精留塔11の下部塔11cの底部付近に前記第1ライン3が連通し、下部塔11cの第1ライン3の連通個所の上側に第2ライン4が連通している。また、前記製品酸素供給ライン6の基端部は複式精留塔11の上部塔11aの底部に接続されている。また、複式精留塔11の上部塔11aの頂部から過冷却器12を介して図示しない窒素需要先に製品窒素ガスGNを供給する製品窒素供給ライン7が主熱交換器2を介して連通している。
さらに、複式精留塔11の上部塔11aの頂部付近から過冷却器12を介して、不純物除去器1b内の不純物除去剤の再生等に使用される廃窒素WNを供給する廃窒素供給ライン8が主熱交換器2を介して連通している。
即ち、原料空気圧縮機で圧縮されると共に、不純物除去器1bで不純物が除去された原料空気の一部は第1ライン3に流入し、主熱交換器2により略沸点温度まで冷却されて空気分離部10の下部塔11cの底部に導入される。原料空気の残りの部分は第2ライン4に流入し、昇圧空気圧縮機4aで下部塔11cの運転圧力よりも高い圧力に昇圧される。
そして、昇圧空気の一部はクーラ4bで冷却された後に、主熱交換器2で冷却されて液化され、膨張弁4eを経て液体空気貯槽4fに送られる。そして、この液体空気貯槽4f内の液体空気が液体空気量制御手段4gにより制御されて一定量ずつ抜出されて、下部塔11cの下部に導入される。
即ち、主熱交換器2および膨張タービン5cを出て合流した600Nm3/hの原料空気GAと、液体空気貯槽4fから取出された150Nm3/hの液体空気LAを複式精留塔11の下部塔11cに導入し、その上部塔11aの底部から150Nm3/hの液体酸素LOを液体酸素貯槽6bに導出する。
また、この液体酸素貯槽6bから需要先に200Nm3/hの液体酸素LOが12時間供給されると共に、100Nm3/hの液体酸素LOが12時間供給される。従って、1日当たりの液体酸素量は共に3600Nm3になるから、液体酸素LOの需給量はバランスする。
2…主熱交換器,2′…酸素熱交換器
3…第1ライン,31…窒素循環冷却系統,31a…第1循環熱交換器,31b…第2循環熱交換器
4…第2ライン,4a…昇圧空気圧縮機,4b…クーラ,4c…第2昇圧空気圧縮機,4d…第2クーラ,4e…膨張弁,4f…液体空気貯槽,4g…液体空気量制御手段
5…第3ライン,5a…ブロワ,5b…クーラ,5c…膨張タービン
6…製品酸素供給ライン,6a…液体酸素量制御手段,6b…液体酸素貯槽,6c…液体酸素ポンプ
7…製品窒素供給ライン
8…廃窒素供給ライン
10…空気分離部
11…複式精留塔,11a…上部塔,11b…凝縮器,11c…下部塔
12…過冷却器
13…第4ライン
14…第5ライン
15…第6ライン
16…粗アルゴン凝縮器容器,16a…凝縮器,16b…粗アルゴン塔
17…第7ライン
18…第8ライン
19…第9ライン
20…第10ライン
21…粗アルゴン供給ライン
Claims (7)
- 原料空気を圧縮する原料空気圧縮機を備え、この原料空気圧縮機で圧縮された圧縮空気中の不純物を除去する不純物除去器を備え、不純物除去後の圧縮空気を冷却する主熱交換器を備えると共に、上部塔と下部塔とからなり、前記主熱交換器で冷却されて導入された空気を酸素と窒素とに分離する複式精留塔を有する空気分離部を備えてなる空気液化分離装置において、前記主熱交換器を経て下部塔に連通し、不純物除去器を経た原料空気の一部を下部塔に導入する第1ラインと、残りの原料空気を圧縮する昇圧空気圧縮機、主熱交換器を経て下部塔に連通し、主熱交換器から下部塔側に向かって順に、膨張弁、液体空気を貯液する液体空気貯槽、この液体空気貯槽から下部塔に導入する液体空気量を制御する液体空気量制御手段が介装されてなる第2ラインと、この第2ラインから分岐して第1ラインの主熱交換器と下部塔との間に連通し、主熱交換器の下流側に膨張タービンが介装されてなる第3ラインと、上部塔から主熱交換器を介して製品酸素を需要先に供給し、上部塔から主熱交換器側に向かって順に、液体酸素量を制御する液体酸素量制御手段、液体酸素を貯液する液体酸素貯槽が介装されてなる製品酸素供給ラインを備えたことを特徴とする空気液化分離装置。
- 前記製品酸素供給ラインの液体酸素貯槽と主熱交換器との間に、液体酸素を昇圧する液体酸素ポンプを介装したことを特徴とする請求項1に記載の空気液化分離装置。
- 前記第2ラインの昇圧空気圧縮機と主熱交換器との間に、昇圧空気圧縮機で圧縮された昇圧空気を圧縮する第2昇圧空気圧縮機を介装したことを特徴とする請求項1または2のうちの何れか一つの項に記載の空気液化分離装置。
- 原料空気を圧縮する原料空気圧縮機を備え、この原料空気圧縮機で圧縮された圧縮空気中の不純物を除去する不純物除去器を備え、不純物除去後の圧縮空気を冷却する主熱交換器を備えると共に、上部塔と下部塔とからなり、前記主熱交換器で冷却されて導入された空気を酸素と窒素とに分離する複式精留塔を有する空気分離部を備えてなる空気液化分離装置において、前記主熱交換器を経て下部塔に連通し、不純物除去器を経た原料空気の一部を下部塔に導入する第1ラインと、残りの原料空気を圧縮する昇圧空気圧縮機、酸素熱交換器を経て下部塔に連通し、酸素熱交換器から下部塔側に向かって順に、膨張弁、液体空気を貯液する液体空気貯槽、この液体空気貯槽から下部塔に導入する液体空気量を制御する液体空気量制御手段が介装されてなる第2ラインと、この第2ラインから分岐して第1ラインの主熱交換器と下部塔との間に連通し、主熱交換器の下流側に膨張タービンが介装されてなる第3ラインと、上部塔から酸素熱交換器を介して製品酸素を需要先に供給し、上部塔から酸素熱交換器側に向かって順に、液体酸素量を制御する液体酸素量制御手段、液体酸素を貯液する液体酸素貯槽が介装されてなる製品酸素供給ラインを備えたことを特徴とする空気液化分離装置。
- 前記製品酸素供給ラインの液体酸素貯槽と酸素熱交換器との間に、液体酸素を昇圧する液体酸素ポンプを介装したことを特徴とする請求項4に記載の空気液化分離装置。
- 前記第2ラインの昇圧空気圧縮機と酸素熱交換器との間に、第2昇圧空気圧縮機を介装したことを特徴とする請求項4または5のうちの何れか一つの項に記載の空気液化分離装置。
- 原料空気を圧縮する原料空気圧縮機を備え、この原料空気圧縮機で圧縮された圧縮空気中の不純物を除去する不純物除去器を備え、不純物除去後の圧縮空気を冷却する主熱交換器を備えると共に、上部塔と下部塔とからなり、前記主熱交換器で冷却されて導入された空気を酸素と窒素とに分離する複式精留塔を有する空気分離部を備えてなる空気液化分離装置の運転方法において、不純物除去後の一定量の圧縮空気のうちの一部を低温の原料空気として複式精留塔の下部塔に導入し、残りの原料空気を液化させ、液化させた液体空気を液体空気貯槽に貯液しながら、液体空気貯槽から下部塔に液体空気を液体空気量制御手段で流量制御して一定量ずつ導入し、複式精留塔の上部塔から液体酸素量制御手段で流量制御して一定量ずつの液体酸素を液体酸素貯槽に導出すると共に液体酸素貯槽から供給先に酸素ガスを供給するに際して、酸素ガスの需要増大時には、液体酸素貯槽から不足分を供給すると共に、液体酸素の蒸発によって余分に生成された液体空気を液体空気貯槽に貯液する一方、酸素ガスの需要減少時には、余剰の液体酸素を液体酸素貯槽に貯液することを特徴とする空気液化分離装置の運転方法。
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CN106949708A (zh) * | 2016-11-25 | 2017-07-14 | 乔治洛德方法研究和开发液化空气有限公司 | 一种对原有低温空分装置进行改装用以提高低压纯氮气产量的方法 |
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US9222725B2 (en) * | 2007-06-15 | 2015-12-29 | Praxair Technology, Inc. | Air separation method and apparatus |
FR2929385A1 (fr) * | 2008-03-28 | 2009-10-02 | Air Liquide | Appareil et procede de separation d'air par distillation cryogenique |
FR2929697B1 (fr) * | 2008-04-07 | 2010-05-07 | Air Liquide | Procede de production d'azote gazeux variable et d'oxygene gazeux variable par distillation d'air |
JP5642923B2 (ja) * | 2008-06-10 | 2014-12-17 | エア・ウォーター株式会社 | 空気分離方法 |
JP5425612B2 (ja) * | 2009-12-24 | 2014-02-26 | 住友重機械工業株式会社 | オゾンガス濃縮装置 |
JP6464399B2 (ja) * | 2014-10-03 | 2019-02-06 | 神鋼エア・ウォーター・クライオプラント株式会社 | 空気分離装置 |
CN114111218A (zh) * | 2020-08-25 | 2022-03-01 | 贵州盈德气体有限公司 | 空分液化压缩空气的一种新型节能工艺 |
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US7871085B2 (en) | 2008-03-27 | 2011-01-18 | Honda Motor Co., Ltd. | Rear wheel toe angle control device |
CN106949708A (zh) * | 2016-11-25 | 2017-07-14 | 乔治洛德方法研究和开发液化空气有限公司 | 一种对原有低温空分装置进行改装用以提高低压纯氮气产量的方法 |
CN106949708B (zh) * | 2016-11-25 | 2020-02-11 | 乔治洛德方法研究和开发液化空气有限公司 | 一种对原有低温空分装置进行改装用以提高低压纯氮气产量的方法 |
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