Title:
WATER TREATMENT MEMBRANE CLEANING APPARATUS AND CLEANING METHOD
MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2019/039155
Kind Code:
A1
Abstract:
Two ozone dissolution tanks for storing filtrate, which is raw water that has been filtered through a water treatment membrane, are provided in a water treatment membrane cleaning apparatus. This filtrate is circulated while being mixed with ozone gas supplied from an ozone gas-supplying unit in order to generate ozone gas-containing filtrate, the circulation and mixing being performed by a gas suction device which is attached to each ozone dissolution tank. The apparatus is configured so that discharged ozone gas generated in one ozone dissolution tank is suctioned by the gas suction device attached to the other ozone dissolution tank. After said gas suction device mixes the filtrate, obtained by filtering raw water, with the discharged ozone gas, this filtrate is mixed with ozone gas in the other ozone dissolution tank until a specified concentration is reached, and said ozone gas-containing filtrate is supplied from the second-stage filtration side to the first-stage filtration side of the water treatment membrane to clean said water treatment membrane.
Inventors:
KOGA HIROMICHI (JP)
TOKIMORI KOICHI (JP)
YASUNAGA NOZOMU (JP)
TOKIMORI KOICHI (JP)
YASUNAGA NOZOMU (JP)
Application Number:
PCT/JP2018/027217
Publication Date:
February 28, 2019
Filing Date:
July 20, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
C02F1/44; B01D65/02; B01D65/06
Foreign References:
| JP2017087213A | 2017-05-25 | |||
| JP2013086011A | 2013-05-13 | |||
| JP2006055773A | 2006-03-02 | |||
| JPH0398996U | 1991-10-15 | |||
| JP2007069091A | 2007-03-22 |
Attorney, Agent or Firm:
OIWA Masuo et al. (JP)
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