Cleaning method for hollow fiber membrane filtration tower
Abstract
Abstract Translated from Japanese (57)【要約】 【課題】 従来の薬液洗浄後のリンス操作では中空糸膜 フィルタを所定時間浸漬しても中空糸膜モジュール内の 各中空糸膜フィルタに付着した洗浄用薬液を中空糸膜モ ジュールの外側へ十分に拡散させることができず、洗浄 用薬液を洗い落とすには大量の洗浄廃液を発生する。 【解決手段】 本発明の中空糸膜濾過塔の洗浄方法は、 塔本体1の下室2に流入した原水を中空糸膜モジュール 5内の多数本の中空糸膜フィルタ51によって濾過し、 この濾過水を上室3へ流出させる中空糸膜濾過塔におい て、塔本体1内から洗浄用薬液を洗い落とすリンス工程 は、下室2を満水にする満水工程と、満水後の下室2内 に空気を供給して各中空糸膜モジュール5内の水を攪拌 してそれぞれの中空糸膜フィルタ51の表面から洗浄用 薬液を水中へ拡散させるスクラビング工程と、このスク ラビング後の下室2内のリンス廃水を排出する排水工程 とを有することを特徴とする。 (57) [Problem] In a conventional rinsing operation after cleaning of a chemical solution, even if the hollow fiber membrane filter is immersed for a predetermined time, the cleaning chemical solution adhered to each hollow fiber membrane filter in the hollow fiber membrane module is removed. It cannot be sufficiently diffused to the outside of the module, and a large amount of cleaning waste liquid is generated to wash off the cleaning chemical. SOLUTION: The method for washing a hollow fiber membrane filtration tower of the present invention comprises: The raw water flowing into the lower chamber 2 of the tower body 1 is filtered by a number of hollow fiber membrane filters 51 in the hollow fiber membrane module 5, In the hollow fiber membrane filtration tower that allows the filtered water to flow out to the upper chamber 3, the rinsing step of washing off the cleaning chemical solution from the inside of the tower body 1 includes a water filling step of filling the lower chamber 2 with water and a filling step of the lower chamber 2 after the water filling. A scrubbing step of supplying air to agitate the water in each hollow fiber membrane module 5 to diffuse the cleaning chemical into the water from the surface of each hollow fiber membrane filter 51, and rinsing the lower chamber 2 after the scrubbing And a drainage step of discharging wastewater.
Inventors
- 👤 Satoru Tsuda
- 👤 悟 津田
- 👤 Toshio Morita
- 👤 利夫 森田
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