JP2012145320A - 高圧窒素を製造するための方法および装置 - Google Patents
高圧窒素を製造するための方法および装置 Download PDFInfo
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- JP2012145320A JP2012145320A JP2011271464A JP2011271464A JP2012145320A JP 2012145320 A JP2012145320 A JP 2012145320A JP 2011271464 A JP2011271464 A JP 2011271464A JP 2011271464 A JP2011271464 A JP 2011271464A JP 2012145320 A JP2012145320 A JP 2012145320A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000008569 process Effects 0.000 title description 3
- 238000009434 installation Methods 0.000 title 1
- 238000004821 distillation Methods 0.000 claims abstract description 65
- 239000007788 liquid Substances 0.000 claims abstract description 64
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000001301 oxygen Substances 0.000 claims abstract description 35
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 35
- 239000002699 waste material Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 16
- 238000011084 recovery Methods 0.000 description 13
- 239000002912 waste gas Substances 0.000 description 9
- 238000005057 refrigeration Methods 0.000 description 7
- 238000010992 reflux Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011027 product recovery Methods 0.000 description 1
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Abstract
【解決手段】高圧蒸留カラム107と、中圧蒸留カラム106とを備え、露点まで冷却した空気を高圧カラムのベースに導入し、高圧カラムのベースから酸素富化液体を取り出し、該酸素富化液体を中圧カラムの中間位置に導入し、中圧蒸留カラムのベースから液体を取り出し低圧まで低下さた後中圧カラムの頂部凝縮器109に送るとともに、中圧カラムから取り出した蒸気流を圧縮して高圧蒸留カラムのベースに導入し、さらに中圧カラムの頂部から抜き出した液体を高圧にして、高圧蒸留カラムの頂部に注入して、高圧カラムの頂部から窒素を抜き出す。
【選択図】図1
Description
加圧された窒素を製造するための装置において、窒素は通常、使用圧力たとえば5ないし10バールで直接的に製造される。この圧力よりわずか上に圧縮された精製空気を蒸留してカラムの頂部で窒素を製造し、「酸素富化液体」(酸素で富化された空気によってカラムのベースで生成した液体)の膨張およびこの膨張した液体によるカラムの頂部の凝縮器の冷却によって還流を達成する。こうして酸素富化液体を約3ないし6バールの圧力で気化させる。
高圧窒素を製造するための方法および装置を提供する。このシステムは、空気を圧縮して空気を実質的にその露点まで冷却する第1の圧縮機と、高圧カラムと、中圧カラムと、前記高圧カラムのベースに前記冷却された圧縮空気の少なくとも一部を導入する導管と、前記高圧カラムのベースから酸素富化液体を取り出す導管と、前記酸素富化液体の圧力を中圧まで低下させる第1の弁と、ここで前記中圧は前記高圧と大気圧との間であり、前記中圧カラムの中間位置に前記酸素富化液体を導入する導管と、前記中圧蒸留カラムのベースから取り出した液体の少なくとも一部の圧力を、低圧まで低下させて前記中圧カラムの頂部凝縮器を冷却して廃蒸気流を生成させる第2の弁と、前記中圧カラムから取り出した蒸気流を圧縮し、前記圧縮された蒸気流を冷却し、およびこれを前記高圧蒸留カラムのベースに導入する低温圧縮機と、前記廃蒸気流を加熱する熱交換器と、前記加熱された流を膨張させて力を生成させる第1の膨張器と、前記中圧蒸留カラムの頂部から液体を抜き出す導管と、前記抜き出した液体を前記高圧にポンピングし、これを前記高圧蒸留カラムの頂部に注入するポンプと、前記高圧カラムの頂部から製品窒素を抜き出す導管とを有する。
Claims (7)
- 高圧窒素を製造する方法であって、
供給空気を実質的にその露点まで冷却し、
高圧カラムのベースに前記空気の少なくとも一部を導入し、
前記高圧カラムのベースから酸素富化液体を取り出し、
前記酸素富化液体の圧力を中圧まで低下させ、前記中圧は前記高圧と大気圧との間であり、
前記酸素富化液体を中圧カラムの中間位置に導入し、
前記中圧カラムのベースから取り出した液体の少なくとも一部の圧力を低圧まで下げて前記中圧カラムの頂部コンデンサを冷却し、廃蒸気流を生成させ、
前記中圧カラムから取り出した蒸気流を低温圧縮機で圧縮し、前記圧縮した蒸気流を冷却し、これを前記高圧カラムのベースに導入し、
前記廃蒸気流を加熱し、前記加熱した蒸気を膨張させて力を生成させ、
前記中圧カラムの頂部から液体を抜き出し、
前記抜き出した液体を前記高圧にポンピングし、これを前記高圧カラムの頂部に注入し、
前記高圧カラムの頂部から製品窒素を抜き出す
ことを含む方法。 - 前記力の少なくとも一部を前記低温圧縮機によって用いる、請求項1に記載の方法。
- 高圧窒素を製造する装置であって、
供給空気を実質的にその露点まで冷却する熱交換器と、
高圧蒸留カラムと、
中圧蒸留カラムと、
前記高圧蒸留カラムのベースに前記冷却された圧縮空気の少なくとも一部を導入する導管と、
前記高圧蒸留カラムのベースから酸素富化液体を取り出す導管と、
前記酸素富化液体の圧力を中圧まで低下させる第1の弁と、ここで前記中圧は前記高圧と大気圧との間であり、
前記中圧蒸留カラムの中間位置に前記酸素富化液体を導入する導管と、
前記中圧蒸留カラムのベースから取り出した液体の少なくとも一部の圧力を、低圧まで低下させて前記中圧蒸留カラムの頂部凝縮器を冷却して廃蒸気流を生成させる第2の弁と、
前記中圧蒸留カラムから取り出した蒸気流を圧縮する低温圧縮機、前記圧縮された蒸気流を冷却する熱交換器、およびこれを前記高圧蒸留カラムのベースに導入する導管と、
前記廃蒸気流を加熱する熱交換器と、
前記加熱された流を膨張させて力を生成させる第1の膨張器と、
前記中圧蒸留カラムの頂部から液体を抜き出す導管と、
前記抜き出した液体を前記高圧にポンピングし、これを前記高圧蒸留カラムの頂部に注入するポンプと、
前記高圧カラムの頂部から製品窒素を抜き出す導管と
を有する装置。 - 高圧窒素を製造する方法であって、
供給空気を実質的にその露点まで冷却し、
高圧カラムのベースに前記空気の少なくとも一部を導入し、
前記高圧カラムのベースから酸素富化液体を取り出し、
前記酸素富化液体の圧力を中圧まで低下させ、前記中圧は前記高圧と大気圧との間であり、
前記酸素富化液体を中圧カラムの中間位置に導入し、
前記中圧カラムのベースから取り出した液体の少なくとも一部の圧力を低圧まで下げて前記中圧カラムの頂部コンデンサを冷却し、廃蒸気流を生成させ、
前記中圧カラムから取り出した蒸気流を低温圧縮機で圧縮し、前記圧縮した蒸気流を冷却し、これを前記高圧カラムのベースに導入し、
前記廃蒸気流の一部を第1の温度まで加熱し、前記加熱した蒸気を第1の膨張器で膨張させて力を生成させ、
前記廃蒸気流の他の一部をさらに第2の温度まで加熱し、前記さらに加熱した蒸気を第2の膨張器で膨張させて力を生成させ、
前記中圧カラムの頂部から液体を抜き出し、
前記抜き出した液体を前記高圧にポンピングし、これを前記高圧カラムの頂部に注入し、
前記高圧カラムの頂部から製品窒素を抜き出す
ことを含む方法。 - 前記力の少なくとも一部を前記低温圧縮機によって用いる、請求項4に記載の方法。
- 前記中圧カラムから前記蒸気流を取り出すのと同じレベルで前記酸素富化液体を導入して前記低温圧縮機で圧縮する、請求項1の方法。
- 高圧窒素を製造する装置であって、
供給空気を実質的にその露点まで冷却する熱交換器と、
高圧蒸留カラムと、
中圧蒸留カラムと、
前記高圧蒸留カラムのベースに前記冷却された圧縮空気の少なくとも一部を導入する導管と、
前記高圧蒸留カラムのベースから酸素富化液体を取り出す導管と、
前記酸素富化液体の圧力を中圧まで低下させる第1の弁と、ここで前記中圧は前記高圧と大気圧との間であり、
前記中圧蒸留カラムの中間位置に前記酸素富化液体を導入する導管と、
前記中圧蒸留カラムのベースから取り出した液体の少なくとも一部の圧力を、低圧まで低下させて前記中圧蒸留カラムの頂部凝縮器を冷却して廃蒸気流を生成させる第2の弁と、
前記中圧蒸留カラムから取り出した蒸気流を圧縮する低温圧縮機、前記圧縮された蒸気流を冷却する熱交換器、およびこれを前記高圧蒸留カラムのベースに導入する導管と、
前記廃蒸気流を加熱する熱交換器と、
前記加熱された流の一部を膨張させて力を生成させる第1の膨張器と、
前記加熱された流の他の一部を膨張させて力を生成させる第2の膨張器と、
前記中圧蒸留カラムの頂部から液体を抜き出す導管と、
前記抜き出した液体を前記高圧にポンピングし、これを前記高圧蒸留カラムの頂部に注入するポンプと、
前記高圧蒸留カラムの頂部から製品窒素を抜き出す導管と
を有する装置。
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