JP2010172842A - マイクロバブルを用いた気液反応方法及び気液反応装置 - Google Patents
マイクロバブルを用いた気液反応方法及び気液反応装置 Download PDFInfo
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- JP2010172842A JP2010172842A JP2009019366A JP2009019366A JP2010172842A JP 2010172842 A JP2010172842 A JP 2010172842A JP 2009019366 A JP2009019366 A JP 2009019366A JP 2009019366 A JP2009019366 A JP 2009019366A JP 2010172842 A JP2010172842 A JP 2010172842A
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Abstract
【解決手段】エアリフト気泡塔にマイクロバブル発生器を組み込み、ドラフトチューブの径や仕切り板の位置によって塔に対する下降流部の断面積の割合を調整することにより、塔内におけるマイクロバブルの流動状態を制御することを特徴とする、気液反応方法および気液反応装置。
【選択図】図2
Description
本発明の第2は、前記エアリフト気泡塔において,塔に対する下降流部の断面積の割合が0.7以下のものである、請求項1記載の気液反応方法に関する。
本発明の第3は、前記マイクロバルブ発生器に通される気体がオゾンである、請求項1〜2記載の気液反応方法に関する。
本発明の第4は、エアリフト気泡塔内にドラフトチューブあるいは仕切り板が設置され、塔底部にマイクロバルブ発生器が組み込まれたことを特徴とする、請求項1〜3何れかの気液反応装置に関する。
〔実施例〕
流動特性の測定では、ガスに空気、液に水道水を用いた。流動状態を観察し、下降流部(塔とドラフトチューブとの間の環状部分)における液速度、下降流部における平均気泡径及び物質移動容量係数を測定した。平均気泡径は、硬性鏡と高速ビデオを組み合せて撮影したビデオ画像から求めた気泡径分布から算出した。
分解性能の測定では、ガスにオゾンガス、液にメチレンブルー(被分解物質)水溶液を用いた。オゾンガスの濃度は59g/m3、メチレンブルーの濃度は3mmol/m3とした。4分間オゾンを通気した後のメチレンブルー濃度を分析し、分解率を求めた。
A 塔の断面積 [m2]
AD/A 塔断面積に対する下降流部の断面積の割合 [−]
uL,D 下降流部における液速度 [mm/s]
dAVE,D 下降流部における平均気泡径 [μm]
kLa 液相基準物質移動容量係数(aは比界面積) [1/s]
X 分解率 [−]
Claims (4)
- エアリフト気泡塔にマイクロバブル発生器を組み込み、ドラフトチューブの径や仕切り板の位置によって塔に対する下降流部の断面積の割合を調整することにより、塔内におけるマイクロバブルの流動状態を制御することを特徴とする、気液反応方法。
- 前記エアリフト気泡塔において,塔に対する下降流部の断面積の割合が0.7以下のものである、請求項1記載の気液反応方法。
- 前記マイクロバルブ発生器に通される気体がオゾンである、請求項1〜2記載の気液反応方法。
- エアリフト気泡塔内にドラフトチューブあるいは仕切り板が設置され、塔底部にマイクロバルブ発生器が組み込まれたことを特徴とする、請求項1〜3何れかの気液反応装置。
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