METHOD FOR RECOVERING OILS

PROBLEM TO BE SOLVED: To provide a method for recovering oils, which enables installment of pumping sites in high density, can follow variation of oil layer position, oil layer thickness, and the like, and can efficiently recover an oil content out of soil.SOLUTION: Provided is a method for recoveri...

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Bibliographische Detailangaben
Hauptverfasser: SEKI HIROSHI, KOYANAGI YUYA, MITSUNARI MASAYA, KAWAI TATSUJI, MASUDA SHINSUKE, KAWABATA JUNICHI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a method for recovering oils, which enables installment of pumping sites in high density, can follow variation of oil layer position, oil layer thickness, and the like, and can efficiently recover an oil content out of soil.SOLUTION: Provided is a method for recovering oils, where a recovery system 2 is prepared by installing drain materials 1 having high water repellency and lipophilicity at predetermined intervals in an object area of ground 9. Then, a vacuum pump 21 is operated and, while sucking liquid from an oil layer 27 of ground 9 by a drain material 1, liquid withdrawn by each drain material 1 is monitored for inclusion of oils therein. Further, by using a well, a ground water level of an aquifer 29 of ground 9, an oil layer thickness of the oil layer 27, and the like are grasped. Then, based on the monitoring results of oils and the ground water level of the ground 9, a drain material 1, located at a position where a concentration of oils is relatively high, is selected from a plurality of drain materials 1 to perform sucking efficiently. Other drain materials 1 are stopped to suck and, when necessary, liquid injection or gas injection is performed.SELECTED DRAWING: Figure 1 【課題】揚水箇所を高い密度で設置することが可能であり、油層位置および油層厚等の変動に追従でき、地盤中から効率よく油分を回収することができる油類の回収方法の提供。【解決手段】撥水性や親油性の高いドレーン材1を所定の間隔で地盤9の対象範囲に打設して回収装置2を準備する。そして、真空ポンプ21を作動させて、ドレーン材1で地盤9の油層27から液体を吸引しつつ、各ドレーン材1で吸引した液体について液体中の油類の含有をモニタリングする。また、井戸を用いて、地盤9の帯水層29の地下水位および油層27の油層厚等を把握する。そして、油類の含有のモニタリング結果や地盤9の地下水位に基づいて、複数のドレーン材1から相対的に油類の濃度の高い部分に位置するドレーン材1を選択し、吸引を効率よく行う。その他のドレーン材1は吸引を停止し、必要に応じて注液または注気を行う油類の回収方法。【選択図】図1