JP2006349322A - 深冷空気分離装置によるアルゴン製造方法 - Google Patents
深冷空気分離装置によるアルゴン製造方法 Download PDFInfo
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Abstract
【解決手段】 粗アルゴン塔8から抜出した粗アルゴンをアルゴン精製装置10に導入するに際して、前記粗アルゴン塔8の粗アルゴン抜出し口8bから液体粗アルゴンを抜出すと共に、粗アルゴン抜出しライン9を介して主熱交換器2に導入して蒸発させ、蒸発した粗アルゴンを常温になるまで加温する。
【選択図】 図1
Description
ひいては、酸素を除去するアルゴン精製装置に供給される水素量も少なくなるため経済的である。しかしながら、粗アルゴン塔の粗アルゴン抜出し口における粗アルゴンの圧力は、粗アルゴン塔に装備された精留段数が多くなるほど低下するため、ついには粗アルゴンを送出するのに十分な圧力が得られなくなる。
しかしながら、液体粗アルゴンは液体窒素を冷媒として用いる冷却器で過冷却されて主熱交換器に導入されるのであるから、液体粗アルゴンの気化が防止され、液体粗アルゴンの加圧に支障が生じるようなことがない。
この酸素リッチの液体空気は下塔5bの底部から液体空気抜出しライン6を介して抜出され、過冷却器7で冷却された後に2分される。一部の酸素リッチの液体空気は、粗アルゴン塔8内に設けられた粗アルゴン凝縮器8aに供給されて蒸発し、上塔5aの上下方向の中部に供給される。残部の酸素リッチの液体空気は、液体のまま減圧されて上塔5aの上下方向の中部に供給される。
各温度レベルにおいて2〜8℃の温度差があり、液体粗アルゴンを十分蒸発させることができる。図3に示す各流体の流量、圧力は下記のとおりである。
(1) 空気A(G.Air) :8,500Nm3/h,0.5MPaG
(2) 空気B(T.Air) :1,500Nm3/h,0.7MPaG
(3) 窒素(GN) :2,000Nm3/h,0.02MPaG
(4) 酸素(GO) :2,000Nm3/h,0.03MPaG
(5) 廃窒素(WN) :5,950Nm3/h,0.02MPaG
(6) 液体粗アルゴン(Cr.Ar): 50Nm3/h,0.3MPaG
(7) 変成アルゴン(Co.Ar) : 50Nm3/h,0.2MPaG
また、複式精留塔5の上塔5aの上部には、一般的な従来例と同様に、廃窒素抜出しライン15が接続されており、この廃窒素抜出しライン15を介し抜出された廃窒素は、主熱交換器2を経て加温される。そして、加温された廃窒素の一部は吸着塔ユニット1cの吸着剤再生に活用され、残りは大気中に放出される。
2…主熱交換器
3…第1原料空気供給ライン,3a…ブロワ,3b…クーラ,3c…膨張タービン
4…第2原料空気供給ライン
5…複式精留塔,5a…上塔,5b…下塔,5c…主凝縮器,5d…蒸気抜出しライン
6…液体空気抜出しライン
7…過冷却器
8…粗アルゴン塔,8a…粗アルゴン凝縮器,8b…粗アルゴン抜出し口
9…粗アルゴン抜出しライン
10…アルゴン精製装置
11…変成アルゴン供給ライン
12…精製アルゴン塔
13…GN排出ライン,13a…窒素圧縮機
14…GO排出ライン,14a…酸素圧縮機
15…廃窒素抜出しライン
16…冷却器
23…液体窒素排出ライン,23a…液体窒素ポンプ
24…液体酸素排出ライン,24a…液体酸素ポンプ
Claims (2)
- 原料空気を圧縮する原料空気圧縮機と、この原料空気圧縮機から出た圧縮空気を10〜40℃程度の温度に冷却する予冷ユニットと、この予冷ユニットで冷却された圧縮空気中の二酸化炭素および水分を除去する吸着塔ユニットと、この吸着塔ユニットで精製された原料空気をその液化近傍の温度まで冷却する主熱交換器と、原料空気中の窒素・酸素を精留分離する複式精留塔と、この複式精留塔の上塔から流入するアルゴンを含む酸素中のアルゴンを濃縮する粗アルゴン塔と、粗アルゴン中の酸素を除去するアルゴン精製装置と、酸素が除去された変成アルゴンから残留水素・窒素等を除去して製品液体アルゴンとする精製アルゴン塔と、これらに付随する諸設備とを備えた深冷空気分離装置により製品液体アルゴンを製造するアルゴン製造方法において、前記粗アルゴン塔から抜出した粗アルゴンを前記アルゴン精製装置に導入するに際して、前記粗アルゴン塔の粗アルゴン抜出し口から液体粗アルゴンを抜出すと共に、粗アルゴン抜出しラインを介して前記主熱交換器に導入して蒸発させ、蒸発した粗アルゴンガスを常温まで加温することを特徴とする深冷空気分離装置によるアルゴン製造方法。
- 前記粗アルゴン塔から抜出した液体粗アルゴンを、前記粗アルゴン抜出しラインを介して前記主熱交換器に導入する前に、液体窒素を冷媒として用いる冷却器で過冷却することを特徴とする請求項1に記載の深冷空気分離装置によるアルゴン製造方法。
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2943773A1 (fr) * | 2009-03-27 | 2010-10-01 | Air Liquide | Procede et appareil de separation d'air par distillation cryogenique |
CN104034124A (zh) * | 2014-06-27 | 2014-09-10 | 莱芜钢铁集团有限公司 | 一种空气分离装置与带压排液方法 |
JP2016142462A (ja) * | 2015-02-03 | 2016-08-08 | 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 |
KR20160128210A (ko) | 2015-04-28 | 2016-11-07 | 니폰 파이오니쿠스 가부시키가이샤 | 심랭 가스 분리의 전처리 장치 및 그것을 이용한 전처리 방법 |
CN114646188A (zh) * | 2022-05-18 | 2022-06-21 | 河南心连心深冷能源股份有限公司 | 一种脱离空分系统使用的粗氩气提纯液化装置及提纯方法 |
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2005
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2943773A1 (fr) * | 2009-03-27 | 2010-10-01 | Air Liquide | Procede et appareil de separation d'air par distillation cryogenique |
CN104034124A (zh) * | 2014-06-27 | 2014-09-10 | 莱芜钢铁集团有限公司 | 一种空气分离装置与带压排液方法 |
JP2016142462A (ja) * | 2015-02-03 | 2016-08-08 | 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 |
KR20160128210A (ko) | 2015-04-28 | 2016-11-07 | 니폰 파이오니쿠스 가부시키가이샤 | 심랭 가스 분리의 전처리 장치 및 그것을 이용한 전처리 방법 |
CN114646188A (zh) * | 2022-05-18 | 2022-06-21 | 河南心连心深冷能源股份有限公司 | 一种脱离空分系统使用的粗氩气提纯液化装置及提纯方法 |
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