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    • 4. 发明专利
    • DEVICE FOR PURIFYING WATER
    • JP2000009885A
    • 2000-01-14
    • JP17737298
    • 1998-06-24
    • MITSUBISHI HEAVY IND LTD
    • NISHITANI JUNICHIKATO AKIHIKOMURAYAMA JIROKAKIMOTO AKIRA
    • G21C19/307B01D61/14B01D61/18B01D63/02
    • PROBLEM TO BE SOLVED: To largely reduce the channel resistance, namely the pressure loss, and to obtain a required water-sealing flow rate without increasing the membrane area of a hollow fiber membrane by providing a water-guiding pipe inside the hollow fiber membrane of a water-sealing injection filter consisting of an ultrafiltration membrane. SOLUTION: The water-guiding pipe for deriving sealing water through a hollow fiber membrane toward an outlet side is provided inside a portion where a number of hollow fiber membrane are arranged in a water-sealing injection filter 18. Water where a floating substance containing a fine particle through the hollow fiber membrane of the water-sealing injection filter 18 consisting of an ultrafiltration membrane is captured and eliminated is divided into a part for directly flowing to the outlet of the water-sealing injection filter 18 from the hollow fiber membrane and a part for flowing to the outlet through the water-guiding pipe after entering the water-guiding pipe through a header part from the hollow fiber membrane. As a result, water is branched into two directions in the hollow fiber membrane and flows. The pressure loss increases as the inner diameter of a transmission water-guiding pipe 1 is smaller up to 18 mm. On the other hand, when the diameter reaches 8 mm or larger, the inner diameter should preferably be 18 mm or larger to the extent that the pressure loss does not practically interfere with use.