METHOD FOR CLEANING FILTER FILM

PROBLEM TO BE SOLVED: To provide a cleaning method which makes a clogged part of a filter effectively cleaned and which enables appropriate drainage.SOLUTION: A method for cleaning a filter film for use in filtration of seawater includes the steps of: soaking the filter film in a cleaning fluid in w...

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Bibliographic Details
Main Authors KANAZAWA SHINICHI, YAHAGI SATOSHI, MIYATAKE KENICHIRO, KAMIYAMA MUNETSUGU
Format Patent
LanguageEnglish
Japanese
Published 08.06.2017
Subjects
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:PROBLEM TO BE SOLVED: To provide a cleaning method which makes a clogged part of a filter effectively cleaned and which enables appropriate drainage.SOLUTION: A method for cleaning a filter film for use in filtration of seawater includes the steps of: soaking the filter film in a cleaning fluid in which the concentration of sodium hypochlorite is in the range of 100-500 ppm and in which the concentration of salt is 0.5% or more; and performing dechlorination by adding sodium thiosulfate after the soaking step.SELECTED DRAWING: Figure 1 【課題】フィルターの目詰まりを効果的に洗浄し、かつ適正な排水が可能となる洗浄方法を提供する。【解決手段】海水の濾過に用いる濾過膜の洗浄方法であって、前記濾過膜を、次亜塩素酸ナトリウムの濃度が１００ｐｐｍ以上５００ｐｐｍ以下、塩分濃度が０．５％以上である洗浄液に浸漬する工程と、前記浸漬する工程の後にチオ硫酸ナトリウムを加えて脱塩素する工程とを含む濾過膜の洗浄方法とした。【選択図】 図１
Bibliography:Application Number: JP20150237065