JP5229986B2 - 重質炭化水素原料の水蒸気分解方法 - Google Patents
重質炭化水素原料の水蒸気分解方法 Download PDFInfo
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Description
Claims (20)
- 熱分解炉を用いて重質炭化水素原料を分解する方法であって、
前記熱分解炉は、輻射区画及び対流区画を含み、その対流区画は前記第1対流区画管群と第2対流区画管群と第3対流区画管群と第4対流区画管群とを含み、排ガスが前記熱分解炉の前記輻射区画から前記対流区画へ流れ、この対流区画の前記第3対流区画管群は、前記排ガスが第1対流区画管群と接触する前に第3対流区画管群と接触するように配置されており、前記第3対流区画管群には、前記第4対流区画管群の、前記排ガスの流れに関して下流側で且つ第1対流区画管群の上流側に位置するように高圧蒸気過熱器が一体的に組み込まれていることを特徴とし、
(a)重質炭化水素原料を加熱する段階と、
(b)前記重質炭化水素原料を流体と混合して混合物ストリームを形成する段階と、
(c)前記熱分解炉の、前記第1対流区画管群における排ガスとの間接接触によって前記混合物ストリームを加熱する段階と、
(d)前記混合物ストリームをフラッシングして蒸気相及び液相を形成する段階と、
(e)フラッシュ/分離槽において前記液相を除去する段階と、
(f)前記第4対流区画管群において前記蒸気相を加熱する段階と、
(g)前記熱分解炉の輻射区画において前記蒸気相を分解して、オレフィンを含む流出物を生成する段階と、
(h)前記流出物を移送ライン熱交換器を用いてクエンチングして高圧水蒸気を生成する段階と、
(i)前記第3対流区画管群において前記高圧水蒸気を過熱する段階と、
を含み、
前記重質炭化水素原料と混合する前記流体の量を、前記混合物ストリームをフラッシングする前の前記混合物ストリームの温度と、前記フラッシュ/分離槽の圧力と、前記フラッシュ/分離槽の温度と、前記混合物ストリームの流量と、前記熱分解炉内の前記排ガス中の過剰酸素とのうちの少なくとも一つから選択された操作パラメータに従って変化させることを特徴とする方法。 - 請求項1に記載の方法において、前記重質炭化水素原料は、水蒸気分解したガスオイル及び残留油、ガスオイル、暖房油、ジェット燃料、ディーゼル燃料、灯油、ガソリン、コーカーナフサ、水蒸気分解ナフサ、接触分解ナフサ、水素化分解油、改質油、ラフィネート改質油、フィッシャー−トロプシュ液体、フィッシャー−トロプシュガス、天然ガソリン、留出油、バージンナフサ、原油、常圧パイプスチルボトム油、ボトム油を含む減圧パイプスチルのストリーム、ナフサからガスオイルまでの広範囲沸点凝縮油、製油所からの非バージン重質炭化水素ストリーム、減圧ガスオイル、重質ガスオイル、原油汚染ナフサ、常圧残留油、重質残留油、C4/残留油混合物、ナフサ/残留油混合物、ガスオイル/残留油混合物、及び原油のうちの一つ以上を含む方法。
- 請求項1又は2に記載の方法において、前記重質炭化水素原料を、前記流体と混合する前に、前記熱分解炉の第1対流区画管群における排ガスとの間接接触によって加熱する方法。
- 請求項1乃至3の何れか一項に記載の方法において、前記流体が炭化水素及び水の少なくとも一つを含む方法。
- 請求項1乃至4の何れか一項に記載の方法において、前記第1対流区画管群に流入する排ガスの温度が1500°F(815℃)未満である方法。
- 請求項5の方法において、前記第1対流区画管群に流入する排ガスの温度が1000°F(540℃)未満である方法。
- 請求項1乃至6の何れか一項に記載の方法において、前記重質炭化水素原料又は混合物のストリームを、前記混合物のストリームをフラッシングする前に、一次希釈水蒸気のストリームと混合する段階を更に含む方法。
- 請求項7の方法において、前記一次希釈水蒸気のストリームを前記熱分解炉の前記対流区画において加熱する方法。
- 請求項1乃至8の何れか一項に記載の方法において、二次希釈水蒸気のストリームを前記熱分解炉の第2対流区画管群において加熱し、続いて、前記二次希釈水蒸気のストリームの少なくとも一部分を、前記混合物ストリームをフラッシングする前に前記混合物のストリームと混合する方法。
- 請求項9の方法において、前記二次希釈水蒸気のストリームを過熱する方法。
- 請求項1乃至10の何れか一項に記載の方法において、段階(d)においてフラッシングする前の前記混合物ストリームの温度が600〜1000°F(315〜540℃)である方法。
- 請求項1乃至11の何れか一項に記載の方法において、前記混合物ストリームを40〜200psiaの圧力でフラッシングする方法。
- 請求項1乃至12の何れか一項に記載の方法において、段階(d)が、前記混合物ストリームの50乃至98パーセントを前記蒸気相にフラッシングすることを更に含む方法。
- 請求項1乃至13の何れか一項に記載の方法において、前記蒸気相を、段階(f)の前に、前記熱分解炉の下部対流区画としての第4対流区画管群において前記フラッシングの温度よりも高い温度に加熱する方法。
- 請求項1乃至14の何れか一項に記載の方法において、二次希釈水蒸気のストリームを前記熱分解炉の第2対流区画管群において加熱し、続いて、前記二次希釈水蒸気のストリームの少なくとも一部分を、段階(f)前の前記蒸気相と混合する方法。
- 請求項1乃至15の何れか一項に記載の方法において、前記高圧水蒸気を1100°F(590℃)未満の温度に過熱する方法。
- 請求項16の方法において、前記高圧水蒸気を850乃至950°F(455乃至510℃)の温度に過熱する方法。
- 請求項16又は17の方法において、中間減温器を使用して、前記第3対流区画管群から流出する前記高圧水蒸気の所要の温度を維持する方法。
- 請求項14の方法において、第4対流区画管群は、前記炉の輻射区画から流出する排ガスが最初に接触する対流区画管群である方法。
- 請求項14乃至19の何れか一項に記載の方法において、前記熱分解炉の前記輻射区画から流出する前記排ガスが、前記第4、第3、第2及び第1対流区画管群と、この順序において接触する方法。
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-
2005
- 2005-02-28 EP EP05724087A patent/EP1727877B1/en not_active Expired - Lifetime
- 2005-02-28 KR KR1020067019483A patent/KR100760093B1/ko not_active Expired - Fee Related
- 2005-02-28 US US11/068,615 patent/US7820035B2/en active Active
- 2005-02-28 JP JP2007504972A patent/JP5229986B2/ja not_active Expired - Fee Related
- 2005-02-28 WO PCT/US2005/006471 patent/WO2005095548A1/en not_active Ceased
- 2005-02-28 CN CNB2005800092873A patent/CN100564484C/zh not_active Expired - Lifetime
- 2005-02-28 CA CA2561356A patent/CA2561356C/en not_active Expired - Fee Related
- 2005-02-28 AT AT05724087T patent/ATE552322T1/de active
Also Published As
| Publication number | Publication date |
|---|---|
| CN100564484C (zh) | 2009-12-02 |
| CA2561356A1 (en) | 2005-10-13 |
| ATE552322T1 (de) | 2012-04-15 |
| KR100760093B1 (ko) | 2007-09-18 |
| WO2005095548A1 (en) | 2005-10-13 |
| EP1727877A1 (en) | 2006-12-06 |
| WO2005095548A8 (en) | 2006-10-26 |
| KR20060124776A (ko) | 2006-12-05 |
| US20050209495A1 (en) | 2005-09-22 |
| JP2007530729A (ja) | 2007-11-01 |
| US7820035B2 (en) | 2010-10-26 |
| EP1727877B1 (en) | 2012-04-04 |
| CN1934226A (zh) | 2007-03-21 |
| CA2561356C (en) | 2011-06-07 |
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