JP5771527B2 - 原油装置における腐食および腐食副産物堆積を低減させる方法 - Google Patents
原油装置における腐食および腐食副産物堆積を低減させる方法 Download PDFInfo
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Description
本発明の例示的な実施形態は、露点水サンプリング装置からの水サンプルを受理する防爆ボックス内のオンラインアナライザーのクラスターから構成される。これらのアナライザーにより生成されるデータは、適切に調整され、制御信号が様々なプロセス化学薬品注入ポンプに送られる。当業者によりプログラミングされたプログラマブル論理制御装置(PLC)が生データをポンプ制御信号に変換する。典型的なシステムは1つ以上の下記構成要素、塩化物アナライザー、鉄アナライザー、腐食速度モニタリング装置、導電率、pH計、露点水サンプル装置、クラスI、Div II防爆筐体、複数の入力/出力が可能なPLC、塩化物、pHおよび鉄データをポンプ速度制御に変換するための論理プログラミング、ならびにPLCからポンプまでの無線または有線接続を含む。
本発明の例示的な実施形態は、塩化物イオン濃度、pH、および鉄イオン濃度の3つの試験パラメータの各々に対する制御の改善を提供する。これらの3つの中で、塩化物は、適正に制御されなければ、通常最も損害を与える。図6のグラフは、どのようにして、本発明が塩化物濃度の制御を改善することができるかを証明する(点線が最適濃度を示す)。本発明の方法によるより良好な制御の同様な概念がpH、鉄イオン濃度および他のシステムパラメータに当てはまり、最終的には腐食速度が前のレベルから低減され、装置の連続運転時間が延長される。
図7のグラフは、実際の原油装置に対する時間と共に追跡されたpHおよび塩化物濃度を示す(点線は最適濃度を示す)。pH値の急降下は通常、塩化物イオン濃度の上方スパイクと同時に生じることが見られる。そのようなpHの急降下により、典型的には、熱交換器の腐食およびその後の汚損(腐食副産物による)が増加する。「制御の実行」と表示されたグラフの部分は、どのように、本発明の方法が使用されて、塩化物イオン濃度およびpHが安定化され、よってシステム内の腐食および汚損が低減されるかを証明する。流入塩化物値の変動を平滑化すると、より厳格なpH制御およびより安定で、予測可能な化学薬品使用が可能になる。
Claims (12)
- 原油装置において腐食および/または腐食副産物堆積を低減させるために、前記原油装置のプロセス流れにおけるシステムパラメータを最適化する方法であって、
(a)前記原油装置内の1つ以上の点で、前記システムパラメータである鉄イオン濃度又は腐食速度を測定および/または予測する工程と、
(b)前記測定および/または予測された鉄イオン濃度又は腐食速度に関連する最適範囲を予め決定し、前記最適範囲は任意でユーザにより規定される、工程と、
(c)前記測定および/または予測された鉄イオン濃度が、前記鉄イオン濃度の最適範囲外にある場合、前記プロセス流れへの造膜阻害剤の流入速度を制御して、前記測定および/または予測された鉄イオン濃度を前記最適範囲内に入れるように前記鉄イオン濃度を調節する、又は前記測定および/または予測された腐食速度が、前記腐食速度の最適範囲外にある場合、前記プロセス流れへの中和剤、腐食剤及び造膜阻害剤の流入速度を制御して、前記測定および/または予測された腐食速度を前記最低範囲内に入れるように前記腐食速度を調節する、工程と、
(d)任意で、(i)前記測定された鉄イオン濃度又は腐食速度を制御装置に伝送させることができる入力電気信号に変換し、かつ(ii)前記入力電気信号を前記制御装置に伝送する工程と、
(e)任意で、複数の異なるシステムパラメータに対し工程(a)から(d)を繰り返し、異なるシステムパラメータはそれぞれ、特有の関連特性を有する工程と、
を含み、
前記造膜阻害剤はアミド類とイミダゾリン類の混合液であり、前記腐食剤は水酸化ナトリウム溶液である、方法。 - 前記制御装置は、(i)前記伝送された入力電気信号を受理し、(ii)前記受理した電気信号を入力数値に変換し、(iii)前記入力数値を分析し、(iv)出力数値を発生させ、(v)前記出力数値を出力電気信号に変換し、および(vi)前記出力電気信号を伝送するように動作可能である、請求項1記載の方法。
- 前記制御装置は、(i)前記入力数値を分析し、および(ii)前記入力数値が前記測定された鉄イオン濃度又は腐食速度の前記最適範囲に対応するかどうかを決定するように動作可能である、請求項1記載の方法。
- 前記入力数値が前記最適範囲に対応しない場合、前記伝送された出力電気信号は前記プロセス流れへの中和剤、腐食剤、造膜阻害剤の流入速度を制御し、前記入力数値を前記最適範囲に対応させるように前記システムパラメータである鉄イオン濃度又は腐食速度を調節することができる、請求項3記載の方法。
- 前記システムパラメータを連続して、または断続的に測定および/または予測する工程を含む、請求項1記載の方法。
- 実時間で前記システムパラメータをモニタする工程を含む、請求項1記載の方法。
- 前記中和剤、前記腐食剤、前記造膜阻害剤の前記プロセス流れへの流入は、集合的に、および/または個々に、前記システムパラメータである鉄イオン濃度又は腐食速度を調節することができる、請求項1記載の方法。
- 前記複数の異なるシステムパラメータは、pH、塩化物イオン濃度、鉄イオン濃度、非鉄金属イオン濃度、腐食速度、およびそれらに組み合わせからなる群より選択される、請求項1記載の方法。
- 前記原油装置は、少なくとも1つの熱交換器を備えた常圧塔を含む複数の構成要素を有し、前記pHおよび塩化物イオン濃度は前記原油装置内の露点水サンプルおよび/またはアキュムレータブート水サンプルから誘導され、前記鉄イオン濃度および前記非鉄金属イオン濃度は前記原油装置内の前記アキュムレータブート水サンプルから誘導される、請求項8記載の方法。
- オンラインの、任意で自動化されたサンプリング装置を用いて前記露点水サンプルおよび/または前記ブート水サンプルを獲得する工程を含む、請求項9記載の方法。
- コンピュータに、請求項1記載の方法を実行させるプログラムを記憶したデジタル記憶媒体。
- 原油装置において腐食および/または腐食副産物堆積を低減させるために、原油装置のプロセス流れにおけるシステムパラメータを最適化するためのシステムであって、
(a)前記システムパラメータである鉄イオン濃度又は腐食速度を感知および/または予測し、前記鉄イオン濃度又は腐食速度を伝送させることができる入力電気信号に変換するように動作可能な感知装置と、
(b)前記入力電気信号を伝送するように動作可能な送信機と、
(c)前記伝送された入力電気信号を受理し、前記受理した入力電気信号を入力数値に変換し、前記入力数値を分析し、前記分析された値が最適範囲内にあるかどうかを決定し、前記分析された値に基づき出力数値を発生させ、前記出力数値を出力電気信号に変換し、前記出力電気信号を伝送するように動作可能な制御装置と、
(d)前記出力電気信号を受理し、前記鉄イオン濃度に基づく出力信号が前記最適範囲内にない場合、前記プロセス流れへの造膜阻害剤の流入速度の変化を引き起こすように動作可能であり、前記鉄イオン濃度を調節することができる、又は前記腐食速度に基づく出力信号が前記最適範囲内にない場合、前記プロセス流れへの中和剤、腐食剤及び造膜阻害剤の流入速度の変化を引き起こすように動作可能であり、前記腐食速度を調節することができる、受信機と、
を備え、
前記造膜阻害剤はアミド類とイミダゾリン類の混合液であり、前記腐食剤は水酸化ナトリウム溶液である、システム。
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CA3014408A1 (en) | 2010-06-03 |
MX2011004492A (es) | 2011-07-28 |
US20100108566A1 (en) | 2010-05-06 |
CN102203219B (zh) | 2013-12-25 |
EP2361293B1 (en) | 2020-08-26 |
US9969947B2 (en) | 2018-05-15 |
US10316261B2 (en) | 2019-06-11 |
CA2741320A1 (en) | 2010-06-03 |
KR20110093862A (ko) | 2011-08-18 |
RU2011114566A (ru) | 2012-12-10 |
US20170369800A1 (en) | 2017-12-28 |
EP2361293A1 (en) | 2011-08-31 |
US9611431B2 (en) | 2017-04-04 |
KR101674229B1 (ko) | 2016-11-08 |
WO2010062728A1 (en) | 2010-06-03 |
CN102203219A (zh) | 2011-09-28 |
EP3744815A1 (en) | 2020-12-02 |
CA3014408C (en) | 2022-06-21 |
US9150793B2 (en) | 2015-10-06 |
AR074188A1 (es) | 2010-12-29 |
CA2741320C (en) | 2018-09-04 |
US20160024395A1 (en) | 2016-01-28 |
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