JPH05345181
PURPOSE:To attempt to make exchange rate of a membrane proper assuming that a guaranteed quality of water is ensured in the operation of a reverse osmosis type sea water desalination apparatus. CONSTITUTION:Electrical conductivity of permeated water through a unit reverse osmosis membrane 1F is meas...
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| creator | KAMINARI TORU |
| description | PURPOSE:To attempt to make exchange rate of a membrane proper assuming that a guaranteed quality of water is ensured in the operation of a reverse osmosis type sea water desalination apparatus. CONSTITUTION:Electrical conductivity of permeated water through a unit reverse osmosis membrane 1F is measured by means of a conductivity meter on an instrument rack through a sampling rack 101 and it is input into a personal computer control apparatus 107 by means of a field operation panel 105. Operating condition of a plant is also input and the electric conductivity is corrected to obtain individual data and an average value and a standard deviation of these data. Pressure densifying factor and membrane deterioration rate factor are obtd. from these data and the membrane exchange rate is obtd. in such a way that the estimated quality of water after exchanging of the membrane does not violate a guaranteed value as the time elapses assuming that exchanging of the membrane is performed at a specified rate every year. Therefore, a proper exchange rate of the membrane can efficiently be set on every reverse osmosis membrane type sea water desalination apparatus and exchanging of the membrane can reasonably be performed and decrease in expenditure of maintenance and control is attainable. |
| format | Patent |
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CONSTITUTION:Electrical conductivity of permeated water through a unit reverse osmosis membrane 1F is measured by means of a conductivity meter on an instrument rack through a sampling rack 101 and it is input into a personal computer control apparatus 107 by means of a field operation panel 105. Operating condition of a plant is also input and the electric conductivity is corrected to obtain individual data and an average value and a standard deviation of these data. Pressure densifying factor and membrane deterioration rate factor are obtd. from these data and the membrane exchange rate is obtd. in such a way that the estimated quality of water after exchanging of the membrane does not violate a guaranteed value as the time elapses assuming that exchanging of the membrane is performed at a specified rate every year. Therefore, a proper exchange rate of the membrane can efficiently be set on every reverse osmosis membrane type sea water desalination apparatus and exchanging of the membrane can reasonably be performed and decrease in expenditure of maintenance and control is attainable.</description><edition>5</edition><language>eng</language><subject>CHEMISTRY ; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC ; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS ; METALLURGY ; PERFORMING OPERATIONS ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; SEPARATION ; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ; TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE ; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE ; TRANSPORTING ; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE</subject><creationdate>1993</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19931227&DB=EPODOC&CC=JP&NR=H05345181A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19931227&DB=EPODOC&CC=JP&NR=H05345181A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>KAMINARI TORU</creatorcontrib><title>JPH05345181</title><description>PURPOSE:To attempt to make exchange rate of a membrane proper assuming that a guaranteed quality of water is ensured in the operation of a reverse osmosis type sea water desalination apparatus. 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CONSTITUTION:Electrical conductivity of permeated water through a unit reverse osmosis membrane 1F is measured by means of a conductivity meter on an instrument rack through a sampling rack 101 and it is input into a personal computer control apparatus 107 by means of a field operation panel 105. Operating condition of a plant is also input and the electric conductivity is corrected to obtain individual data and an average value and a standard deviation of these data. Pressure densifying factor and membrane deterioration rate factor are obtd. from these data and the membrane exchange rate is obtd. in such a way that the estimated quality of water after exchanging of the membrane does not violate a guaranteed value as the time elapses assuming that exchanging of the membrane is performed at a specified rate every year. Therefore, a proper exchange rate of the membrane can efficiently be set on every reverse osmosis membrane type sea water desalination apparatus and exchanging of the membrane can reasonably be performed and decrease in expenditure of maintenance and control is attainable.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE |
| title | JPH05345181 |
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