JP2010528833A - パルス化エアリフトポンプを備えた膜モジュール - Google Patents
パルス化エアリフトポンプを備えた膜モジュール Download PDFInfo
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Abstract
【選択図】図2
Description
6 膜束
7 下方注封ヘッド
10 分配室
11 パルス化ガスリフトポンプ装置
12 倒立ガス回収室
15 上昇管
18 管状トラフ
21 バイオリアクタタンク
22 膜タンク
23 倒立ガス回収室
27 コンパートメント
28 コンパートメント
30 膜濾過モジュール
35 膜モジュール
36 給水タンク
40 ガス流路
Claims (56)
- 液状媒体に沈められた膜表面を流体流で洗浄する方法であって、ランダムに発生させた間欠的またはパルス化された流体を前記膜表面に沿って流して、膜表面からファウリング物質を除去するステップが含まれている方法。
- 前記流体流にガス流が含まれることを特徴とする、請求項1に記載の方法。
- 前記ガス流に気泡が含まれることを特徴とする、請求項2に記載の方法。
- 前記流体流に気液二相流が含まれることを特徴とする、請求項1に記載の方法。
- 加圧ガス流を供給される装置を用いてパルス化気液二相流を生じさせるステップが含まれることを特徴とする、請求項4に記載の方法。
- 前記加圧ガス流がほぼ一定であることを特徴とする、請求項5に記載の方法。
- さらに、ほぼ一定の気液二相流に関してパルス化気液二相流を用いるステップが含まれることを特徴とする、請求項1に記載の方法。
- さらに、前記液状媒体内に付加気泡源を設けるステップが含まれることを特徴とする、請求項1に記載の方法。
- 前記パルス化流体流は、振幅及び/または周波数及び/または持続時間がランダムであることを特徴とする、請求項1に記載の方法。
- 複数の多孔質膜または1組の膜モジュールと、ほぼランダムに発生するパルス化流体流を生じさせ、使用時に、前記流体流が前記膜の表面を通過して、前記膜表面からファウリング物質を除去するようにするための装置を備える膜モジュール。
- 前記流体流にガス流が含まれることを特徴とする、請求項10に記載の膜モジュール。
- 前記ガス流に気泡が含まれることを特徴とする、請求項11に記載の膜モジュール。
- 前記パルス化ガス流が、ある供給量のガスを供給される装置によって生じることを特徴とする、請求項11に記載の膜モジュール。
- 前記パルス化流体流に気液二相流が含まれることを特徴とする、請求項10に記載の膜モジュール。
- 前記パルス化流体流は振幅及び/または周波数及び/または持続時間がランダムであることを特徴とする、請求項10に記載の膜モジュール。
- 前記パルス化流体流を生じさせるための装置は、前記装置と流体的に通じている分配器を備え、前記パルス化流体流が前記分配器を介して前記モジュールに分配されることを特徴とする、請求項10に記載の膜モジュール。
- 各モジュール毎に1つの前記装置が設けられていることを特徴とする、請求項10に記載の膜モジュール。
- いくつかのモジュールに対して1つの前記装置が設けられていることを特徴とする、請求項10に記載の膜モジュール。
- 前記パルス化流体流が前記装置の中でランダムに発生し、ランダムな分布パターンを形成することを特徴とする、請求項17または請求項18に記載の膜モジュール。
- アレイをなすように取り付けられ、縦方向に延びて膜モジュールを形成する複数の多孔質中空系膜が、それらの間における過剰な動きを防ぐように互いに極めて近接して配列され、取り付けられて、その膜表面からファウリング物質を除去する方法であって、前記膜表面を通過するほぼランダムで均一に分布したパルス化された気泡を生じさせるステップが含まれており、前記分布によって、前記気泡が前記アレイの各膜間をほぼ均一に流れて、前記膜表面にスカーリングを施し、前記膜モジュール内から堆積した固体を除去することを特徴とする、方法。
- 前記気泡流に気液二相流が含まれることを特徴とする、請求項20に記載の複数の多孔質中空糸膜の表面からファウリング物質を除去する方法。
- 前記パルス化気液二相流が、ほぼ一定供給量のガスを供給される装置によって生じることを特徴とする、請求項21に記載の複数の多孔質中空糸膜の表面からファウリング物質を除去する方法。
- 前記パルス化気泡流は振幅及び/または周波数及び/または持続時間がランダムであることを特徴とする、請求項21または請求項22に記載の複数の多孔質中空糸膜の表面からファウリング物質を除去する方法。
- 複数の多孔質中空糸膜を含む膜モジュールであって、前記中空糸膜が、互いに極めて近接して配置され、取り付けられて、それらの間における過剰な動きを防ぐようになっており、前記中空糸膜は各端部がヘッダに固定され、1つのヘッダには、ほぼランダムなパルス化ガス流を導入して、前記中空糸膜の表面を洗浄するための1つ以上の孔が形成されていることを特徴とする、膜モジュール。
- 前記パルス化ガス流が気泡の形態をなすことを特徴とする、請求項24に記載の膜モジュール。
- 前記パルス化ガス流には気液二相流が含まれることを特徴とする、請求項24または請求項25に記載の膜モジュール。
- 前記パルス化気液二相流が、ある供給量のガスを供給される装置によって生じることを特徴とする、請求項26に記載の膜モジュール。
- 前記ガス供給量がほぼ一定であることを特徴とする、請求項27に記載の膜モジュール。
- 前記パルス化気泡流は振幅及び/または周波数及び/または持続時間がランダムであることを特徴とする、請求項24または請求項25に記載の膜モジュール。
- 前記装置に、それに接続されたガス源からの前記加圧ガスの供給量に応答して、加圧ガスを貯え、間欠的に放出し、前記放出ガスを利用して、液体リザーバからの多量の前記液体をガスリフトし、前記パルス化気液二相流を生じさせる働きをするガスリフトポンプ装置が含まれることを特徴とする、請求項14または請求項27に記載の膜モジュール。
- 前記ガスリフトポンプ装置に、前記ガス源によって供給される前記ガスを貯えるようになっており、閉鎖上方端及び前記液体リザーバ内に配置された開放下方端を備える倒立ガス貯蔵室と、前記ガス貯蔵室内に配置されていて、前記液体リザーバと流体的に通じている吸込み口及び前記膜モジュールと流体的に通じている吐出し口を有する垂直上昇管を備えており、前記上昇管が、前記ガス貯蔵室内のガスレベルが所定のレベルに達すると、前記ガス貯蔵室から前記貯えられたガスを供給されて、前記上昇管を介して前記液体をガスリフトし、前記膜モジュール内に吐き出すように配置された、前記ガス貯蔵室と流体的に通じている開口部を備えていることを特徴とする、請求項30に記載の膜モジュール。
- 前記ガスの供給が加圧ガスを収容している外部タンクによって実施され、前記タンクが、前記膜モジュールと流体的に通じており、ランダムに発生するガスパルスを前記モジュールに供給して、前記膜表面を洗浄するための気泡流を生じさせるための制御手段を備えていることを特徴とする、請求項14または請求項27に記載の膜モジュール。
- 前記制御手段に、前記膜モジュールへのガス/液体吸込み口内に配置され、前記吸込み口内における液位に応じて、前記外部タンクからガスを供給する流体流制御装置が含まれることを特徴とする、請求項32に記載の膜モジュール。
- 前記装置が、前記モジュールに前記パルス化気泡をほぼ均一に分配する流体分配器と流体的に通じていることを特徴とする、請求項24に記載の膜モジュール。
- 給水を導入するための手段を備えたタンクと、前記タンク内に活性スラッジを形成するための手段と、前記スラッジ内に沈むように前記タンク内に配置された請求項24に記載の膜モジュールと、前記膜モジュールに設けられて、前記膜の少なくとも1つの端部から濾過水を取り出すための手段を含む膜型バイオリアクタ。
- 前記タンクに給水を導入するステップと、前記中空糸を真空にして、濾過水を取り出すステップと、その一方で前記モジュール内のエアレーション開口部に前記パルス化ガス流を通して、使用時に、前記ガス流が前記膜中空糸の表面を通過して、その表面からファウリング物質を除去するようにするステップが含まれている、請求項35に記載の膜型バイオリアクタを操作する方法。
- さらに、前記タンク内にもう1つのエアレーション源を設けるステップが含まれることを特徴とする、請求項36に記載の膜型バイオリアクタを操作する方法。
- 前記膜モジュールが前記タンク内で縦方向に吊るされ、前記もう1つのエアレーション源が前記吊るされたモジュールの下方に設けられることを特徴とする、請求項36に記載の膜型バイオリアクタを操作する方法。
- 前記もう1つのエアレーション源に一群の通気性管が含まれることを特徴とする、請求項33に記載の膜型バイオリアクタを操作する方法。
- タンクと、このタンクに流体的につながった液体室と、この液体室と流体的につながっているガス室と、前記ガス室と流体的につながっている膜モジュールが含まれている、水処理システム。
- さらに、前記液体室に接続された吸込み側と前記ガス室に接続された吐出し側を備えるガス供給システムが含まれることを特徴とする、請求項40に記載の水処理システム。
- さらに、前記液体室に流体的につながったガス源が含まれることを特徴とする、請求項40または請求項41に記載の水処理システム。
- さらに、前記膜モジュールを収容する膜モジュール容器が含まれ、前記膜モジュール容器が前記タンクと液圧的につながっていることを特徴とする、請求項40に記載の水処理システム。
- 水源と流体的につながっている液体リザーバと、前記液体リザーバと流体的につながっている第1のコンパートメント、及び、第2のコンパートメントを取り囲むガス/液体室と、前記第2のコンパートメントと液圧的につながっている膜分離容器が含まれている、水処理システム。
- さらに、前記膜モジュールから液圧的に隔離されたチャンバと、前記チャンバに接続されたガス源が含まれることを特徴とする、請求項44に記載の水処理システム。
- 前記膜モジュールが膜タンクに収容された混合液内に沈められており、前記膜タンクが前記チャンバと流体的につながっているエアレーションゾーンと液圧的につながっていることを特徴とする、請求項44または請求項45に記載の水処理システム。
- 膜モジュールにスカーリングを施す方法であって、
第1のコンパートメントと第2のコンパートメントを備えたチャンバを設けるステップと、
前記第1のコンパートメントと前記膜モジュールの間に水封を施すステップと、
前記第1のコンパートメントに液体を少なくとも部分的に充填し、前記チャンバにガスを導入するステップが含まれている、
方法。 - さらに、前記水封を破り、前記水封を破ることによって、前記チャンバ内に収容されたガスの少なくとも一部が膜モジュールに対して放出されるようにするステップと、その後で前記第1のコンパートメントと前記膜モジュールの間に前記水封を再度施すステップが含まれていることを特徴とする、請求項47に記載の膜モジュールにスカーリングを施す方法。
- 前記水封を再度破り、前記水封を再度施して、前記チャンバに収容されているガスの少なくとも一部のパルス化放出を生じさせるステップが含まれることを特徴とする、請求項47に記載の膜モジュールにスカーリングを施す方法。
- 前記第2のコンパートメントに液体を導入するステップが含まれることを特徴とする、請求項47に記載の膜モジュールにスカーリングを施す方法。
- 前記チャンバへのガスの導入がほぼ連続して実施されることを特徴とする、請求項47に記載の膜モジュールにスカーリングを施す方法。。
- 容器内のいくつかの位置で液体内にほぼランダムな流体パルスを生じさせて、前記液体を収容している前記容器内に配置された濾過膜を洗浄する方法。
- 前記流体パルスは振幅及び/または周波数及び/または持続時間がランダムであることを特徴とする、請求項52に記載の方法。
- 前記流体にガスが含まれることを特徴とする、請求項52に記載の方法。
- 前記ガスに気泡が含まれることを特徴とする、請求項54に記載の方法。
- 前記流体に気液二相混合物が含まれることを特徴とする、請求項52に記載の方法。
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