JP5185316B2 - 高められた還流流を用いた炭化水素の回収法 - Google Patents
高められた還流流を用いた炭化水素の回収法 Download PDFInfo
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Description
本発明は、図2に示したように、メタン及びより軽質の成分、並びにC2成分、C3成分、及びより重質の炭化水素を含むインレット供給ガス流を、実質的にメタン及びより軽質の成分のすべてを含む揮発性の大きいガス留分、並びにC2成分、C3成分、及びより重質の炭化水素の大部分を含む揮発性の小さい炭化水素留分に分離する方法を好都合に提供する。
本発明の別の実施形態として、図3に示すように、メタン及びより軽質の成分、並びにC2成分、C3成分、及びより重質の炭化水素成分を含むインレットガス流112を、メタン及びより軽質の成分を含む揮発性の大きい留分、並びにC2成分、C3成分、及びより重質の炭化水素110の大部分を含む揮発性の小さい留分に分離する方法が、好都合に提供される。この実施形態は、より高いエタン回収率、即ち98%から99%が必要な時に、用いることができる。
本発明の別の実施形態として、図4に示すように、メタン及びより軽質の成分、並びにC2成分、C3成分、及びより重質の炭化水素成分を含む供給ガス流を、メタン及びより軽質の成分を含む揮発性の大きい留分、並びにC2成分、C3成分、及びより重質の炭化水素210の大部分を含む揮発性の小さい留分に分離する方法が、好都合に提供される。この方法210の実施形態において、供給ガス流212は、第一の供給ガス流213、第二の供給ガス流218、及び第三の供給ガス流228に分割される。
また、本明細書に記載した本方法の実施形態に加えて、本発明は、本方法の実施形態を実施するために必要な装置を好都合に提供する。より具体的には、本発明は、分留塔50、吸収塔32、インレット分離器22、膨張器70、複数の圧縮器74及び80、複数の交換器14、56、38及び84、及び本明細書に記載され、かつ図2〜4に説明された残りの装置を含むことが好都合である。
Claims (15)
- メタン及びより軽質の成分、並びにC2成分、C3成分、及びより重質の炭化水素を含むインレットガス流を、メタン及びより軽質の成分を含む揮発性の大きいガス留分、並びにエタンの少なくとも96%を含む揮発性の小さい炭化水素留分に分離する方法であって、
供給ガス圧力をもつ供給ガス流を冷却し、かつ部分的に凝縮して冷却された供給流を提供するステップ、
冷却された供給流を、第一の蒸気流及び第一の液体流に分離するステップ、
第一の蒸気流を、第一のガス流及び第二のガス流に分割するステップ、
第一のガス流を低い圧力に膨張させ、それにより第一のガス流が分留塔下部供給流を形成するステップ、
分留塔に、分留塔下部供給流、第一の塔供給流、及び第二の塔供給流を供給し、分留塔が、分留塔下部供給流、第一の塔供給流、及び第二の塔供給流を、塔ボトム流及び塔頂留出流に分離するステップ、
塔頂留出流を加温して残留ガス流を製造するステップを含む方法であり、その際、改善が
一つ以上の物質移動段を含む吸収塔に、吸収塔下部供給流として第二のガス流を供給するステップ、
第一の液体流を冷却し、吸収塔上部供給流として吸収塔に供給して、吸収塔が、吸収塔頂留出流及び吸収塔ボトム流を製造するステップ、
吸収塔頂留出流を冷却し、かつそれにより凝縮して、第一の塔供給流を製造するステップ、
吸収塔ボトム流を冷却して第二の塔供給流を製造するステップ、及び
第一及び第二の塔供給流の量及び温度を維持して、それにより塔頂留出流の塔頂留出物温度が維持され、かつエタンの少なくとも96%が塔ボトム流に回収されるステップを含む方法。 - 第二のガス流を冷却した後、吸収塔に第二のガス流を供給するステップを更に含む請求項1に記載の方法。
- 改善が、96%超のエタンの回収、及び99.5%超のプロパンの回収を与えることを更に含む請求項1から2の任意の一項に記載の方法。
- 第二のガス流及び冷却された第一の液体流の少なくとも一部を、供給ガス圧力と低い圧力の間の中間圧力に膨張させるステップ、及び
吸収塔を中間圧力で操作するステップを更に含む請求項1から3の任意の一項に記載の方法。 - 分留塔下部供給流を低い圧力に膨張させて、膨張した分留塔下部供給流を製造し、かつ膨張した分留塔下部供給流を、第一の塔供給流より下方の供給位置で蒸留塔に導くステップを更に含む請求項1から4の任意の一項に記載の方法。
- 塔頂留出流を加温し、第一の液体流を冷却し、吸収塔頂留出流を冷却しそれにより凝縮させ、かつ吸収塔ボトム流を冷却するステップが、塔頂留出流、第一の液体流、吸収塔頂留出流及び吸収塔ボトム流を熱交換接触させることにより行われる請求項1から5の任意の一項に記載の方法。
- 改善が、
残留ガス流を残留リサイクル流及び揮発性残留ガス流に分割するステップ、及び
残留リサイクル流を冷却しそれにより凝縮した後、残留リサイクル流を分留塔に戻すステップを更に含む請求項1に記載の方法。 - 吸収塔ボトム流の少なくとも一部が、凝縮されて第二の塔供給流を製造する請求項1に記載の方法。
- 第二のガス流を冷却し、供給ガス圧力と低い圧力の間の中間圧力に膨張させるステップ、
冷却された第一の液体流の少なくとも一部を、冷却し、かつ中間圧力に膨張させるステップ、及び
吸収塔を中間圧力で操作するステップを更に含む請求項1から8の任意の一項に記載の方法。 - メタン及びより軽質の成分、並びにC2成分、C3成分、及びより重質の炭化水素成分を含む供給ガス流を、メタン及びより軽質成分を含む揮発性の大きい留分、並びにエタンの少なくとも96%を含む揮発性の小さい留分に分離する方法であって、
供給ガス流を、第一の供給ガス流及び第二の供給ガス流に分割するステップ、
第一の供給ガス流を冷却し、かつ部分的に凝縮して、冷却された供給流を製造するステップ、
冷却された供給流を、第一の蒸気流及び第一の液体流に分離するステップ、
第一の蒸気流を低い圧力に膨張させて、分留塔下部供給流を製造するステップ、
分留塔に、分留塔下部供給流、第一の塔供給流、及び第二の塔供給流を供給し、分留塔が、分留塔下部供給流、第一の塔供給流、及び第二の塔供給流を、塔ボトム流及び塔頂留出流に分離するステップ、
塔頂留出流を加温して残留ガス流を製造するステップを含む方法であり、その際、改善が
(i)一つ以上の物質移動段を含む吸収塔に、吸収塔下部供給流として第二の供給ガス流を供給するステップ、
(ii)第一の液体流を冷却して冷却された第一の流を作成し、かつ吸収塔に、吸収塔上部供給流として、冷却された第一の液体流を供給して、吸収塔が、吸収塔頂留出流及び吸収塔ボトム流を製造するステップ、
(iii)吸収塔頂留出流を冷却し、それにより吸収塔頂留出流の少なくとも一部が凝縮されて第一の塔供給流を製造するステップ、
(iv)吸収塔ボトム流を冷却し、それにより吸収塔ボトム流の少なくとも一部が凝縮されて第二の塔供給流を製造するステップ、及び
(v)第一及び第二の塔供給流の量及び温度を維持して、それにより塔頂留出流の塔頂留出物温度が維持され、かつエタンの少なくとも96%が塔ボトム流に回収されるステップを含む方法。 - 第二の供給ガス流を冷却した後、吸収塔に導くステップを更に含む請求項10に記載の方法。
- 改善が、96%超のエタンの回収、及び99.5%超のプロパンの回収を与えることを更に含む請求項10から11の任意の一項に記載の方法。
- 第二の供給ガス流を冷却し、かつ供給ガス圧力と低い圧力の間の中間圧力に膨張させるステップ、
冷却された第一の液体流の少なくとも一部を、冷却し、かつ中間圧力に膨張させるステップ、及び
吸収塔を中間圧力で操作するステップを更に含む請求項10から12の任意の一項に記載の方法。 - 分留塔下部供給流を低い圧力に膨張させ、かつ膨張した分留塔下部供給流を、第一の塔供給流の下方の供給位置で蒸留塔に導くステップを更に含む請求項10から13の任意の一項に記載の方法。
- 塔頂留出流を加温し、第一の液体流を冷却し、吸収塔頂留出流の少なくとも一部を冷却しそれにより凝縮させ、かつ吸収塔ボトム流を冷却するステップが、塔頂留出流、第一の液体流、吸収塔頂留出流及び吸収塔ボトム流を熱交換接触させることにより行われる請求項10から14の任意の一項に記載の方法。
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Application Number | Priority Date | Filing Date | Title |
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US10/803,490 | 2004-03-18 | ||
US10/803,490 US7159417B2 (en) | 2004-03-18 | 2004-03-18 | Hydrocarbon recovery process utilizing enhanced reflux streams |
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JP2007504127A Division JP4524307B2 (ja) | 2004-03-18 | 2005-03-18 | 高められた還流流を用いた炭化水素の回収法 |
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JP2010195809A JP2010195809A (ja) | 2010-09-09 |
JP5185316B2 true JP5185316B2 (ja) | 2013-04-17 |
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JP2007504127A Active JP4524307B2 (ja) | 2004-03-18 | 2005-03-18 | 高められた還流流を用いた炭化水素の回収法 |
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EP1743129B8 (en) | 2015-08-19 |
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WO2005090888A1 (en) | 2005-09-29 |
NO339134B1 (no) | 2016-11-14 |
KR101169485B1 (ko) | 2012-07-30 |
JP4524307B2 (ja) | 2010-08-18 |
US20050204774A1 (en) | 2005-09-22 |
JP2007529712A (ja) | 2007-10-25 |
EP1743129A1 (en) | 2007-01-17 |
KR20060132000A (ko) | 2006-12-20 |
EP1743129B1 (en) | 2015-07-08 |
US7159417B2 (en) | 2007-01-09 |
JP2010195809A (ja) | 2010-09-09 |
CA2560554A1 (en) | 2005-09-29 |
AU2005224664B2 (en) | 2010-04-15 |
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