JP5259703B2 - メタンリッチ流の極低温分離方法及び装置 - Google Patents
メタンリッチ流の極低温分離方法及び装置 Download PDFInfo
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- JP5259703B2 JP5259703B2 JP2010511697A JP2010511697A JP5259703B2 JP 5259703 B2 JP5259703 B2 JP 5259703B2 JP 2010511697 A JP2010511697 A JP 2010511697A JP 2010511697 A JP2010511697 A JP 2010511697A JP 5259703 B2 JP5259703 B2 JP 5259703B2
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims description 124
- 238000000034 method Methods 0.000 title claims description 47
- 238000000926 separation method Methods 0.000 title claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 93
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 62
- 229910052757 nitrogen Inorganic materials 0.000 claims description 46
- 239000007788 liquid Substances 0.000 claims description 35
- 239000001569 carbon dioxide Substances 0.000 claims description 31
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 31
- 239000001301 oxygen Substances 0.000 claims description 31
- 229910052760 oxygen Inorganic materials 0.000 claims description 31
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 29
- 239000007789 gas Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 18
- 238000004821 distillation Methods 0.000 claims description 13
- 238000000746 purification Methods 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 10
- 238000001179 sorption measurement Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000008929 regeneration Effects 0.000 claims description 5
- 238000011069 regeneration method Methods 0.000 claims description 5
- 230000008016 vaporization Effects 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 claims description 3
- 239000000047 product Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 3
- 150000002926 oxygen Chemical class 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- -1 expanded in valve 25 Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- 238000004172 nitrogen cycle Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000012264 purified product Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Description
i)前記流れは、供給材料流と比較して二酸化炭素が希薄な(appauvri)流れを生じさせるための吸着精製ユニットへと送られ、
ii)前記二酸化炭素が希薄な流れの少なくとも一部は、冷却されて冷却流れを生じ、
iii)前記冷却流の少なくとも一部は、蒸留塔へと送られ、
iv)供給材料流と比較してメタンに富んだ流れが、蒸留塔から抜き出され、
v)供給材料流と比較して窒素及び/又は酸素に富んだ流れが、蒸留塔から抜き出され、
vi)精製ユニットは、気化したメタンリッチ液体の少なくとも一部により再生されることを特徴とする方法が提供される。
−再生ガスとして働いた気化したメタンは、製品を構成し、好ましくは、1乃至3%の二酸化炭素を含んでいる。
−前記二酸化炭素が希薄な流れは、前記塔の上流において、この塔から抜き出された少なくとも1種の流体により冷却される。
−前記塔から抜き出された先の流体は、窒素に富んだ及び/又は酸素に富んだ流れである。
−前記塔から抜き出された前記流体は、メタンに富んだ流れである。
−メタンに富んだ流れは、液体の形態で抜き出される。
−メタンに富んだ液体は、前記二酸化炭素が希薄な流れとの熱交換により気化する。
−再生に役立った前記気化した液体の二酸化炭素含有量は、特には、精製ユニットの上流で取り出された先の気化したメタンリッチ液体の一部と混合することにより実質的に一定に保たれる。
−外部供給源からの液体窒素流を気化させることにより冷却が少なくとも部分的に維持される。
−前記二酸化炭素が希薄な流れとの熱交換により液体窒素が気化する。
−前記塔の頂部にあるコンデンサにおいて液体窒素が気化する。
−冷凍サイクルにより、冷却が少なくとも部分的に維持される。
−前記メタンに富んだ流れを気体及び/又は液体の形態で生じさせる。
−前記塔の底部にあるリボイラーは、場合により、前記分離されるべき流れの少なくとも一部によって加熱される。
−前記塔から抜き出される前記メタンに富んだ流れは、少なくとも98%か又は99%のメタン(au moins 98, voire 99% methane)を含んでいる。
−供給材料流は、75乃至95%のメタンを含んでいる。
−供給材料流は、合計で3乃至25%の窒素及び/又は酸素を含んでいる。
i)吸着精製ユニットと、前記供給材料流と比較して二酸化炭素が希薄な流れを生じさせるために、前記供給材料流をそこに送る手段と
ii)前記二酸化炭素が希薄な流れの少なくとも一部を冷却して、冷却流を生じさせる手段と、
iii)蒸留塔と、冷却流の少なくとも一部を、前記蒸留塔へと送る手段と、
iv)供給材料流と比較してメタンに富んだ流れを、蒸留塔から抜き出す手段と、
v)供給材料流と比較して窒素及び/又は酸素に富んだ流れを、蒸留塔から抜き出す手段と
を具備した装置が提供される。
以下に、本願出願の当初の特許請求の範囲に記載された発明を付記する。
[1]メタンに富んでおり、二酸化炭素と、窒素若しくは酸素の何れか又はこれらの双方とを更に含んだ供給材料流の極低温分離方法であって、i)前記流れは、前記供給材料流と比較して二酸化炭素が希薄な流れを生じさせるための吸着精製ユニット(3、29)へと送られ、ii)前記二酸化炭素が希薄な流れの少なくとも一部は、冷却されて冷却流を生じ、iii)前記冷却流の少なくとも一部は、蒸留塔(17)へと送られ、iv)前記供給材料流と比較してメタンに富んだ流れ(27)が、前記蒸留塔から抜き出され、v)前記供給材料流と比較して窒素及び/又は酸素に富んだ流れ(19)が、前記蒸留塔から抜き出され、vi)前記精製ユニット(3、29)は、気化したメタンリッチ液体の少なくとも一部により再生されることを特徴とする方法。
[2][1]記載の方法であって、前記二酸化炭素が希薄な流れは、前記塔(17)の上流において、前記塔から抜き出された少なくとも1種の流体により冷却されることを特徴とする方法。
[3][2]記載の方法であって、前記塔(17)から抜き出された前記流体は、前記窒素及び/又は酸素に富んだ流れ(19)であることを特徴とする方法。
[4][2]又は[3]記載の方法であって、前記塔(17)から抜き出された前記流体は、前記メタンに富んだ流れ(27)であることを特徴とする方法。
[5][4]記載の方法であって、前記メタンに富んだ流れ(27)は液体の形態で抜き出されることを特徴とする方法。
[6][5]記載の方法であって、前記メタンに富んだ液体(27)は、前記二酸化炭素が希薄な流れ(5)との熱交換により気化することを特徴とする方法。
[7][1]乃至[6]の何れか1記載の方法であって、再生に役立った気化した液体の二酸化炭素含有量は、特には、前記精製ユニットの上流で取り出された前記気化したメタンリッチ液体の一部(101)と混合することにより実質的に一定に保たれることを特徴とする方法。
[8][1]乃至[7]の何れか1記載の方法であって、外部供給源からの液体窒素流(201、211)を気化させることにより冷却が少なくとも部分的に維持されることを特徴とする方法。
[9][9]記載の方法であって、前記二酸化炭素が希薄な流れとの熱交換により液体窒素が気化することを特徴とする方法。
[10][8]又は[9]記載の方法であって、前記塔(17)の頂部にあるコンデンサ(67)において液体窒素が気化することを特徴とする方法。
[11][1]乃至[10]の何れか1記載の方法であって、冷凍サイクルにより冷却が少なくとも部分的に維持されることを特徴とする方法。
[12][1]乃至[11]の何れか1記載の方法であって、前記メタンに富んだ流れ(27)を気体及び/又は液体の形態で生じさせることを特徴とする方法。
[13][1]乃至[12]の何れか1記載の方法であって、前記塔(17)の底部にあるリボイラー(11)は、場合により、分離されるべき前記流れの少なくとも一部によって加熱されることを特徴とする方法。
[14][1]乃至[13]の何れか1記載の方法であって、前記塔から抜き出された前記メタンに富んだ流れ(27)は、少なくとも98か又は99%のメタンを含んでいることを特徴とする方法。
[15][1]乃至[14]の何れか1記載の方法であって、前記供給材料流(1)は、75乃至95%のメタンを含んでいることを特徴とする方法。
[16][17]記載の方法であって、前記供給材料流(1)は、合計で3乃至25%の窒素及び/又は酸素を含んでいることを特徴とする方法。
Claims (17)
- メタンに富んでおり、二酸化炭素と、窒素若しくは酸素の何れか又はこれらの双方とを更に含んだ供給材料流の極低温分離方法であって、
i)前記供給材料流は、前記供給材料流と比較して二酸化炭素が希薄な流れを生じさせるための吸着精製ユニット(3、29)へと送られ、
ii)二酸化炭素が希薄な前記流れの少なくとも一部は、冷却されて冷却流を生じ、
iii)前記冷却流の少なくとも一部は、蒸留塔(17)へと送られ、
iv)前記供給材料流と比較してメタンに富んだ流れ(27)が、前記蒸留塔から抜き出され、交換器(9)に送られ、ここで気化して気体のメタンが生じ、
v)前記供給材料流と比較して窒素及び/又は酸素に富んだ流れ(19)が、前記蒸留塔から抜き出され、
vi)前記交換器(9)において生じた気体のメタンの少なくとも一部が、前記精製ユニット(3、29)を再生することを特徴とする方法。 - 請求項1記載の方法であって、二酸化炭素が希薄な前記流れは、前記塔(17)の上流において、前記塔から抜き出された少なくとも1種の流体により冷却されることを特徴とする方法。
- 請求項2記載の方法であって、前記塔(17)から抜き出された前記流体は、窒素及び/又は酸素に富んだ前記流れ(19)であることを特徴とする方法。
- 請求項2又は3記載の方法であって、前記塔(17)から抜き出された前記流体は、メタンに富んだ前記流れ(27)であることを特徴とする方法。
- 請求項4記載の方法であって、メタンに富んだ前記流れ(27)は液体の形態で抜き出されることを特徴とする方法。
- 請求項5記載の方法であって、メタンに富んだ前記液体(27)は、二酸化炭素が希薄な前記流れ(5)との熱交換により気化することを特徴とする方法。
- 請求項1乃至6の何れか1項記載の方法であって、前記精製ユニット(3、29)の再生に役立った気体のメタンの二酸化炭素含有量は、一定に保たれることを特徴とする方法。
- 請求項7記載の方法であって、前記精製ユニット(3、29)の再生に役立った気体のメタンの二酸化炭素含有量は、メタンに富んだ前記流れ(27)を気化させることにより生じた気体のメタンのうち前記精製ユニットの上流で取り出された一部(101)と混合することにより一定に保たれることを特徴とする方法。
- 請求項1乃至8の何れか1項記載の方法であって、外部供給源からの液体窒素流(201、211)を気化させることにより冷却が少なくとも部分的に維持されることを特徴とする方法。
- 請求項9記載の方法であって、二酸化炭素が希薄な前記流れとの熱交換により液体窒素が気化することを特徴とする方法。
- 請求項9又は10記載の方法であって、前記塔(17)の頂部にあるコンデンサ(67)において液体窒素が気化することを特徴とする方法。
- 請求項1乃至11の何れか1項記載の方法であって、冷凍サイクルにより冷却が少なくとも部分的に維持されることを特徴とする方法。
- 請求項1乃至12の何れか1項記載の方法であって、メタンに富んだ前記流れ(27)を気体及び/又は液体の形態で生じさせることを特徴とする方法。
- 請求項1乃至13の何れか1項記載の方法であって、前記塔(17)の底部にあるリボイラー(11)は、分離されるべき前記流れの少なくとも一部によって加熱されることを特徴とする方法。
- 請求項1乃至14の何れか1項記載の方法であって、前記塔から抜き出されたメタンに富んだ前記流れ(27)は、少なくとも98か又は99%のメタンを含んでいることを特徴とする方法。
- 請求項1乃至15の何れか1項記載の方法であって、前記供給材料流(1)は、75乃至95%のメタンを含んでいることを特徴とする方法。
- 請求項1乃至16の何れか1項記載の方法であって、前記供給材料流(1)は、合計で3乃至25%の窒素及び/又は酸素を含んでいることを特徴とする方法。
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FR2971331B1 (fr) * | 2011-02-09 | 2017-12-22 | L'air Liquide Sa Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede et appareil de separation cryogenique d'un debit riche en methane |
FR2971332B1 (fr) * | 2011-02-09 | 2017-06-16 | Air Liquide | Procede et appareil de separation cryogenique d'un debit riche en methane |
US10488105B2 (en) | 2015-12-14 | 2019-11-26 | Exxonmobil Upstream Research Company | Method and system for separating nitrogen from liquefied natural gas using liquefied nitrogen |
FR3046086B1 (fr) | 2015-12-24 | 2018-01-05 | Waga Energy | Procede de production de biomethane par epuration de biogaz issu d'installations de stockage de dechets non-dangereux (isdnd) et installation pour la mise en œuvre du procede |
FR3051892B1 (fr) * | 2016-05-27 | 2018-05-25 | Waga Energy | Procede de separation cryogenique d'un debit d'alimentation contenant du methane et des gaz de l'air, installation pour la production de bio methane par epuration de biogaz issus d'installations de stockage de dechets non-dangereux (isdnd) mettant en œuvre le procede |
FR3066258A1 (fr) * | 2017-05-11 | 2018-11-16 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Systeme et procede de traitement d’un flux de gaz naturel |
FR3075660B1 (fr) | 2017-12-21 | 2019-11-15 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede de distillation d'un courant gazeux contenant de l'oxygene |
FR3075658B1 (fr) | 2017-12-21 | 2022-01-28 | Air Liquide | Procede de limitation de la concentration d'oxygene contenu dans un courant de biomethane |
FR3075659B1 (fr) | 2017-12-21 | 2019-11-15 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede de production d'un courant de gaz naturel a partir d'un courant de biogaz. |
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FR3081047B1 (fr) | 2018-11-12 | 2020-11-20 | Air Liquide | Procede d’extraction d'azote d'un courant de gaz naturel |
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |