JP2022539596A - 流動接触分解プロセス及び装置 - Google Patents
流動接触分解プロセス及び装置 Download PDFInfo
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Abstract
Description
第1の運転モード(第2の反応器のみ)において、混合触媒は、再生器17から流れ、第2の反応器32へ誘導されてもよい。本モードでは、バルブ38は閉鎖されていてもよい一方、バルブ63は開放されている。触媒の流量は、例えば、蒸気出口(ライン45)温度の設定値に基づいていてもよい。C4オレフィン及びナフサストリームは、液相又は蒸気相のどちらかで、1つ以上のフィード分配器34(34a、34b)を通して触媒床の底部セクションへ注入される。第2の反応器32は混合フロー様式で運転し、再生触媒の一部が下方へ(反応器床の上部から底部へ)流れ、再生触媒混合物及びフィード炭化水素ストリームの一部が上方へ(反応器床の底部から上部へ)流れる。
第2の運転モード(1反応器+触媒冷却器)において、混合触媒は、再生器17から粒子冷却器70へ誘導されるフローであってもよい。本モードでは、バルブ38は開放されていてもよい一方、バルブ63は閉鎖されている。スタンドパイプ30を介して粒子冷却器70へ流入する触媒の流量は、例えば、考えられる制御変数のなかでも特に、再生器17の温度、又は粒子冷却器70を流れる触媒と直接的若しくは間接的に熱を交換する熱交換媒体72の出口温度の1つ以上に基づいていてもよい。
第3の運転モード(2反応器+粒子冷却器)において、混合触媒は、再生器17から第2の反応器32及び粒子冷却器70の両方へ流入してもよい。本モードでは、バルブ38及び63の両方が開放されていてもよく、スタンドパイプ30からの混合触媒の一部が第2の反応器32へ誘導されてもよく、残りの部分が粒子冷却器70へ誘導されてもよい。粒子冷却器及び第2の反応器の運転は、最初の2つのモードで上述した通りであり、本モードでは、(第2の反応器32を介した)炭化水素の変換及び(粒子冷却器70を介した)再生器内容物の冷却の両方が行われる。
Claims (13)
- 炭化水素を処理するためのシステムであって、
第1の粒子及び第2の粒子の混合物を炭化水素フィードストックと接触させて、上記炭化水素フィードストックの少なくとも一部を変換し、且つ混合炭化水素と上記第1及び第2の粒子の混合物とを含むライザー反応器エフルエントを回収するよう構成されたライザー反応器であって、上記第1の粒子は、上記第2の粒子よりも平均粒子径が小さく且つ/又は密度が低く、上記第1の粒子及び第2の粒子は、独立に触媒又は非触媒粒子であってもよい、ライザー反応器;
上記第1の粒子及び上記第2の粒子を含む混合物を第2の炭化水素フィードストックと接触させて、上記第2の炭化水素フィードストックの少なくとも一部を変換するよう構成された反応器であって、
第1の粒子、上記第2の粒子の第1の部分、及び炭化水素を含む反応器エフルエントを上記反応器から回収するための塔頂製品ライン、
上記第2の粒子の第2の部分を含む第2のストリームを上記反応器から回収するための塔底製品ライン
と流体接続された反応器;
上記反応器エフルエントから第2の粒子を分離し、且つ上記炭化水素及び上記第1の粒子を含む炭化水素エフルエントと、該分離済み第2の粒子を含む第2のストリームとを生成するよう構成された粒子セパレータ;
上記分離済み第2の粒子を上記粒子セパレータから上記反応器へ返送するためのフィードライン;
上記炭化水素エフルエント及び上記ライザー反応器エフルエントを受け入れ、且つ(i)上記炭化水素エフルエント中の上記炭化水素から上記第1の粒子を、(ii)上記ライザー反応器エフルエント中の上記混合炭化水素から上記第1及び第2の粒子の混合物を分離して、(a)ひとまとめにした炭化水素エフルエントストリームと、(b)第1及び第2の粒子の混合物とを生成するよう構成された分離システム;
上記分離システム内で回収した上記第1及び第2の粒子の混合物を再生するための再生器;
熱交換媒体と、交互に、断続的に、又は同時に(i)第1及び第2の粒子の混合物を含む上記触媒再生器からの高温再生粒子及び(ii)上記塔底製品ラインを介して回収した第2の触媒粒子との間で熱を交換するよう構成された粒子冷却器;
上記粒子冷却器から冷却済み粒子を回収し、該冷却済み粒子を上記再生器へ供給するためのフローライン
を有するシステム。 - 上記分離済み粒子から追加の炭化水素をストリッピングし、該ストリッピング済み粒子を上記再生器へ供給するための、上記分離システムと上記再生器との中間にあるストリッパを更に有する、請求項1に記載のシステム。
- 上記分離システムから回収した上記ひとまとめにした炭化水素エフルエントストリームを、ナフサ留分を含む2種以上の炭化水素留分に分離するための第2の分離システム;及び
上記ナフサ留分を上記炭化水素フィードストックとして上記反応器へ供給するためのフィードライン
を更に有する、請求項1に記載のシステム。 - 新しい第2の触媒を上記反応器へ供給するための第1のフィードライン;
新しい第1の触媒を上記再生器へ供給するための第2のフィードライン
を更に有する、請求項1に記載のシステム。 - (a)上記再生器から上記粒子冷却器への第1及び第2の粒子のフロー、(b)上記再生器から上記反応器への第1及び第2の粒子のフロー、及び/又は(c)上記反応器から上記粒子冷却器への第2の粒子のフローを選択的に誘導するよう構成されたフロー制御システム及び関連バルブを更に有する、請求項1に記載のシステム。
- 炭化水素を変換するためのプロセスであって、
炭化水素フィードストックと第1の粒子及び第2の粒子の混合物とをライザー反応器へ供給する工程であって、上記第1の粒子は、上記第2の粒子よりも平均粒子径が小さく且つ/又は密度が低く、上記第1の粒子及び第2の粒子は、独立に触媒又は非触媒粒子であってもよい、工程;
上記第1及び第2の粒子の混合物を上記第2の炭化水素フィードストックと接触させて、上記炭化水素フィードストックを分解し、炭化水素と第1及び第2の粒子の混合物とを含むライザー反応器エフルエントを生成する工程;
上記ライザー反応器エフルエントをセパレータへ供給して、上記第1及び第2の粒子を上記炭化水素から分離する工程;
上記セパレータから炭化水素製品を回収する工程;
上記分離済み第1及び第2の粒子を再生器へ供給する工程;
上記再生器内で上記第1及び第2の粒子を再生する工程;
第1の期間において、
上記再生器から反応器へ再生済み第1の粒子及び第2の粒子を供給する工程;
炭化水素フィードストックを上記反応器へ供給し、上記炭化水素フィードストックを上記再生済み第1及び第2の粒子と接触させる工程;
変換済み炭化水素エフルエント、上記第2の粒子の少なくとも一部、及び上記第1の粒子を含む上記反応器からの塔頂製品を回収する工程;
上記第2の粒子を上記塔頂製品から分離して、上記第1の粒子及び上記変換済み炭化水素エフルエントを含む第1のストリームと、上記分離済み第2の粒子を含む第2のストリームとを得る工程;
上記第1のストリームを上記セパレータへ供給する工程;及び
上記第2のストリーム中の上記分離済み第2の粒子を上記反応器へ返送する工程;並びに、
第2の期間において、
再生済み第1の粒子及び第2の粒子を上記再生器から粒子冷却器へ供給する工程;
上記粒子冷却器において、熱交換媒体と上記再生済み第1の粒子及び第2の粒子との間で熱を交換する工程;
上記粒子冷却器から冷却済み粒子を回収し、上記冷却済み粒子を上記再生器へ供給する工程
を有するプロセス。 - 第2の粒子を含む上記反応器からの塔底製品を回収する工程を更に有する、請求項6に記載のプロセス。
- 上記反応器内で上記第2の粒子から追加の炭化水素をストリッピングし、該ストリッピング済み粒子を上記再生器へ供給する工程を更に有する、請求項7に記載のプロセス。
- 新しい第2の粒子を上記反応器へ供給する工程;
新しい第1の粒子を上記再生器へ供給する工程
を更に有する、請求項6に記載のプロセス。 - 上記炭化水素製品を、ナフサ留分を含む2種以上の炭化水素留分に分離する工程;及び
上記ナフサ留分を上記炭化水素フィードストックとして上記反応器へ供給する工程
を更に有する、請求項6に記載のプロセス。 - 第3の期間において、
第2の粒子を上記反応器から上記粒子冷却器へ供給する工程;及び
上記粒子冷却器から第2の粒子を回収する工程
を更に有する、請求項6に記載のプロセス。 - 上記回収済み第2の粒子を上記再生器へ供給する工程を更に有する、請求項11に記載のプロセス。
- 第3の期間において、
再生済み第1の粒子及び第2の粒子を上記再生器から上記反応器及び上記粒子冷却器の両方へ供給する工程、並びに同時に、
上記第1の期間に関して上記反応器を運転する工程;及び
上記第2の期間に関して上記粒子冷却器を運転する工程
を更に有する、請求項6に記載のプロセス。
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