JP4452239B2 - 炭化水素の分離方法および分離装置 - Google Patents
炭化水素の分離方法および分離装置 Download PDFInfo
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- JP4452239B2 JP4452239B2 JP2005511987A JP2005511987A JP4452239B2 JP 4452239 B2 JP4452239 B2 JP 4452239B2 JP 2005511987 A JP2005511987 A JP 2005511987A JP 2005511987 A JP2005511987 A JP 2005511987A JP 4452239 B2 JP4452239 B2 JP 4452239B2
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- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
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- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
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- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/70—Refluxing the column with a condensed part of the feed stream, i.e. fractionator top is stripped or self-rectified
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- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
- F25J2205/04—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum in the feed line, i.e. upstream of the fractionation step
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- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
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- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
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Description
(a)該原料ガスを冷却し、その一部を凝縮させて気液分離する工程;
(b)工程(a)で得られた液を蒸留塔に供給する工程;
(c)工程(a)で得られたガスをエキスパンダーにより膨張させ、その一部を凝縮させて気液分離する工程;
(d)工程(c)で得られた液を該蒸留塔に供給する工程;
(e)工程(c)で得られたガスを第1の部分と第2の部分に分岐する工程;
(f)該第1の部分を該蒸留塔に供給する工程;
(g)該第2の部分を圧縮しかつ冷却して凝縮させた後減圧して該蒸留塔にリフラックスとして供給する工程;
(h)該蒸留塔の塔頂部から該残留ガスを得、該蒸留塔の塔底部から該重質留分を得る工程
を有することを特徴とする炭化水素の分離方法が提供される。
(a)該原料ガスを冷却し、その一部を凝縮させて気液分離する工程;
(b)工程(a)で得られた液を蒸留塔に供給する工程;
(c)工程(a)で得られたガスをエキスパンダーにより膨張させ、その一部を凝縮させて気液分離する工程;
(d)工程(c)で得られた液を該蒸留塔に供給する工程;
(e)工程(c)で得られたガスを第1の部分と第2の部分に分岐する工程;
(f)該第1の部分を該蒸留塔に供給する工程;
(g)該第2の部分を圧縮しかつ冷却して凝縮させた後減圧して該蒸留塔にリフラックスとして供給する工程;
(h)該蒸留塔の塔頂部から該残留ガスを得、該蒸留塔の塔底部から該重質留分を得る工程
を有することを特徴とする炭化水素の分離方法が提供される。
塔頂部から該残留ガスを排出し、塔底部から該重質留分を排出する蒸留塔;
該原料ガスを冷却しその一部を凝縮させ、一部が凝縮した原料ガスを気液分離する冷却分離手段;
該冷却分離手段で得られた液を該蒸留塔に供給するライン;
該冷却分離手段で得られたガスを膨張させその一部を凝縮させるエキスパンダー;
該エキスパンダー出口に接続された気液分離器;
該気液分離器で得られた凝縮液を該蒸留塔に供給するライン;
該気液分離器で得られたガスを第1の部分と第2の部分に分岐する分岐手段;
該第1の部分を該蒸留塔に供給するライン;
該第2の部分を圧縮する圧縮手段;
該圧縮手段で圧縮されたガスを冷却して凝縮させる冷却手段;
該冷却手段で得られた凝縮液を減圧する減圧手段;および
該減圧手段で減圧された凝縮液を該蒸留塔にリフラックスとして供給するライン
を有することを特徴とする炭化水素の分離装置が提供される。
塔頂部から該残留ガスを排出し、塔底部から該重質留分を排出する蒸留塔;
該原料ガスを冷却しその一部を凝縮させ、一部が凝縮した原料ガスを気液分離する冷却分離手段;
該冷却分離手段で得られた液を該蒸留塔に供給するライン;
該冷却分離手段で得られたガスを膨張させその一部を凝縮させるエキスパンダー;
該エキスパンダー出口に接続された気液分離器;
該気液分離器で得られた凝縮液を該蒸留塔に供給するライン;
該気液分離器で得られたガスを第1の部分と第2の部分に分岐する分岐手段;
該第1の部分を該蒸留塔に供給するライン;
該第2の部分を圧縮する圧縮手段;
該圧縮手段で圧縮されたガスを冷却して凝縮させる冷却手段;
該冷却手段で得られた凝縮液を減圧する減圧手段;および
該減圧手段で減圧された凝縮液を該蒸留塔にリフラックスとして供給するライン
を有することを特徴とする炭化水素の分離装置が提供される。
図1に示した構成のガス処理プラントを用い、エタン回収を行った例を説明するが、本発明はこれに制限されるものではない。ここでは、あらかじめ水が除去された高圧の原料天然ガスが、6.24MPa、17.1℃の条件でガス処理プラントに導入される。この時の原料ガスの組成は、表1に示されるとおりである。流量は13,700kg−mol/時(103モル/時)である。なおCn(nは自然数)は炭素数nの炭化水素を表す。
C5+は炭素数5以上の炭化水素を表す。
米国特許第4,140,504号公報の技術(Gas Subcooled Process)によりエタン回収を行った。その結果を実施例1の結果と共に表3にまとめる。
Claims (6)
- 少なくともメタンとメタンより低揮発性の炭化水素とを含む原料ガスを、蒸留塔を用いて、メタンが富化されかつメタンより低揮発性の炭化水素がより薄い残留ガスと、メタンがより薄くかつメタンより低揮発性の炭化水素が富化された重質留分とに分離する炭化水素の分離方法において、
(a)該原料ガスを冷却し、その一部を凝縮させて気液分離する工程;
(b)工程(a)で得られた液を蒸留塔に供給する工程;
(c)工程(a)で得られたガスをエキスパンダーにより膨張させ、その一部を凝縮させて気液分離する工程;
(d)工程(c)で得られた液を該蒸留塔に供給する工程;
(e)工程(c)で得られたガスを第1の部分と第2の部分に分岐する工程;
(f)該第1の部分を該蒸留塔に供給する工程;
(g)該第2の部分を圧縮しかつ冷却して凝縮させた後減圧して該蒸留塔にリフラックスとして供給する工程;
(h)該蒸留塔の塔頂部から該残留ガスを得、該蒸留塔の塔底部から該重質留分を得る工程
を有することを特徴とする炭化水素の分離方法。 - 少なくともエタンとエタンより低揮発性の炭化水素とを含む原料ガスを、蒸留塔を用いて、エタンが富化されかつエタンより低揮発性の炭化水素がより薄い残留ガスと、エタンがより薄くかつエタンより低揮発性の炭化水素が富化された重質留分とに分離する炭化水素の分離方法において、
(a)該原料ガスを冷却し、その一部を凝縮させて気液分離する工程;
(b)工程(a)で得られた液を蒸留塔に供給する工程;
(c)工程(a)で得られたガスをエキスパンダーにより膨張させ、その一部を凝縮させて気液分離する工程;
(d)工程(c)で得られた液を該蒸留塔に供給する工程;
(e)工程(c)で得られたガスを第1の部分と第2の部分に分岐する工程;
(f)該第1の部分を該蒸留塔に供給する工程;
(g)該第2の部分を圧縮しかつ冷却して凝縮させた後減圧して該蒸留塔にリフラックスとして供給する工程;
(h)該蒸留塔の塔頂部から該残留ガスを得、該蒸留塔の塔底部から該重質留分を得る工程
を有することを特徴とする炭化水素の分離方法。 - 工程(g)における冷却において冷却媒体として前記残留ガスを用いる請求項1または2記載の方法。
- 少なくともメタンとメタンより低揮発性の炭化水素とを含む原料ガスを、メタンが富化されかつメタンより低揮発性の炭化水素がより薄い残留ガスと、メタンがより薄くかつメタンより低揮発性の炭化水素が富化された重質留分とに分離する炭化水素の分離装置において、
塔頂部から該残留ガスを排出し、塔底部から該重質留分を排出する蒸留塔;
該原料ガスを冷却しその一部を凝縮させ、一部が凝縮した原料ガスを気液分離する冷却分離手段;
該冷却分離手段で得られた液を該蒸留塔に供給するライン;
該冷却分離手段で得られたガスを膨張させその一部を凝縮させるエキスパンダー;
該エキスパンダー出口に接続された気液分離器;
該気液分離器で得られた凝縮液を該蒸留塔に供給するライン;
該気液分離器で得られたガスを第1の部分と第2の部分に分岐する分岐手段;
該第1の部分を該蒸留塔に供給するライン;
該第2の部分を圧縮する圧縮手段;
該圧縮手段で圧縮されたガスを冷却して凝縮させる冷却手段;
該冷却手段で得られた凝縮液を減圧する減圧手段;および
該減圧手段で減圧された凝縮液を該蒸留塔にリフラックスとして供給するライン
を有することを特徴とする炭化水素の分離装置。 - 少なくともエタンとエタンより低揮発性の炭化水素とを含む原料ガスを、エタンが富化されかつエタンより低揮発性の炭化水素がより薄い残留ガスと、エタンがより薄くかつエタンより低揮発性の炭化水素が富化された重質留分とに分離する炭化水素の分離装置において、
塔頂部から該残留ガスを排出し、塔底部から該重質留分を排出する蒸留塔;
該原料ガスを冷却しその一部を凝縮させ、一部が凝縮した原料ガスを気液分離する冷却分離手段;
該冷却分離手段で得られた液を該蒸留塔に供給するライン;
該冷却分離手段で得られたガスを膨張させその一部を凝縮させるエキスパンダー;
該エキスパンダー出口に接続された気液分離器;
該気液分離器で得られた凝縮液を該蒸留塔に供給するライン;
該気液分離器で得られたガスを第1の部分と第2の部分に分岐する分岐手段;
該第1の部分を該蒸留塔に供給するライン;
該第2の部分を圧縮する圧縮手段;
該圧縮手段で圧縮されたガスを冷却して凝縮させる冷却手段;
該冷却手段で得られた凝縮液を減圧する減圧手段;および
該減圧手段で減圧された凝縮液を該蒸留塔にリフラックスとして供給するライン
を有することを特徴とする炭化水素の分離装置。 - 前記冷却手段が前記塔頂部から排出された残留ガスを冷却媒体とする熱交換器を含む請求項4または5記載の装置。
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| JP2003278984 | 2003-07-24 | ||
| JP2003278984 | 2003-07-24 | ||
| JP2003376939 | 2003-11-06 | ||
| JP2003376939 | 2003-11-06 | ||
| PCT/JP2004/009101 WO2005009930A1 (ja) | 2003-07-24 | 2004-06-28 | 炭化水素の分離方法および分離装置 |
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| JPWO2005009930A1 JPWO2005009930A1 (ja) | 2007-09-27 |
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| US (1) | US7357003B2 (ja) |
| EP (1) | EP1695951B1 (ja) |
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| WO (1) | WO2005009930A1 (ja) |
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| US7357003B2 (en) | 2008-04-15 |
| EP1695951B1 (en) | 2014-08-27 |
| EP1695951A4 (en) | 2012-02-29 |
| EP1695951A1 (en) | 2006-08-30 |
| WO2005009930A1 (ja) | 2005-02-03 |
| JPWO2005009930A1 (ja) | 2007-09-27 |
| US20050155382A1 (en) | 2005-07-21 |
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