Title:
MEMBRANE FILTRATION DEVICE AND METHOD FOR CLEANING MEMBRANE FILTRATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/137564
Kind Code:
A1
Abstract:
A plurality of membrane separation units 11 are disposed vertically in multiple levels. In each of the membrane separation units 11: the primary side, to which raw water is supplied, is connected to a backwash drainage system 12 and a flushing air supply system 13; and the secondary side, from which a permeate is removed, communicates with a backwash water supply system 15. The backwash water supply system 15 has: a backwash water main pipe 151 channeling backwash water; and a plurality of backwash water branch pipes 152 connected in parallel to the backwash water main pipe 151, the backwash water branch pipes 152 feeding backwash water towards the respective membrane separation unit 11 in each of the levels. The backwash drainage system 12 has: a plurality of backwash drainage branch pipes 122 into which backwash drain water flows from the respective membrane separation unit 11 in each of the levels; and a backwash drainage main pipe 121 to which the respective backwash drainage branch pipe 122 in each of the levels is connected, the backwash drainage main pipe 121 channeling backwash water from above to below. The flushing air supply system 13 has: an air main pipe 131 channeling flushing air from below to above; and a plurality of air branch pipes 132 connected in parallel to the air main pipe 131, the air branch pipes 132 feeding the flushing air towards the respective membrane separation unit 11 in each of the levels.
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Inventors:
NISHIMOTO SHINTARO (JP)
WATANABE KEISHI (JP)
UENAKA TETSUYA (JP)
ZHAO FANG (JP)
MATSUNAGA AKIRA (JP)
WATANABE KEISHI (JP)
UENAKA TETSUYA (JP)
ZHAO FANG (JP)
MATSUNAGA AKIRA (JP)
Application Number:
PCT/JP2019/048609
Publication Date:
July 02, 2020
Filing Date:
December 12, 2019
Export Citation:
Assignee:
KUBOTA KK (JP)
International Classes:
C02F1/44; B01D65/02
Domestic Patent References:
| WO2010084961A1 | 2010-07-29 |
Foreign References:
| JP2002346348A | 2002-12-03 | |||
| JP2008207143A | 2008-09-11 | |||
| JPS6362748B2 | 1988-12-05 | |||
| JPS6362748B2 | 1988-12-05 |
Other References:
See also references of EP 3892363A4
Attorney, Agent or Firm:
MORIMOTO INT'L PATENT OFFICE (JP)
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