METHOD FOR THE PURlFICATION OF A LIQUID BY MEMBRANE DISTILLATION, IN PARTICULAR FOR THE PRODUCTION OF DESALINATED WATER FROM SEA WATER OR BRACKISH WATER OR PROCESS WATER
Postupak za pre iš avanje te nosti membranskom destilacijom, a naro ito za proizvodnju desalinizovane vode iz morske vode ili slane vode ili procesne vode, koji se sastoji od: - propuštanja relativno toplog toka isparljive te nosti tj. toka (3) retentata iznad porozne membrane (4), prolaska pare kro...
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| description | Postupak za pre iš avanje te nosti membranskom destilacijom, a naro ito za proizvodnju desalinizovane vode iz morske vode ili slane vode ili procesne vode, koji se sastoji od: - propuštanja relativno toplog toka isparljive te nosti tj. toka (3) retentata iznad porozne membrane (4), prolaska pare kroz pore membrane na drugu stranu pomenute membrane, - kondenzovanja pomenute pare na relativno hladnoj površini kondenzatora (2), daju i tok (10) destilata, a pomenuta površina kondenzatora formira neporoznu pregradu izmedju toka (1) za napajanje koji treba da se pre isti, i pomenutog toka (10) destilata pri emu je tok (1) za napajanje protiv-strujan sa tokom (3) retentata, tako da se znatan deo latentne toplote prenese preko pare na tok (1) za napajanje, - izmedju porozne membrane (4) i površine kondenzatora (2) je prisutan gasni zazor (5), širine manje od 5 mm, - pritiska koji se odr ava u gasnom zazoru (5), koji je manji od atmosferskog pritiska, a viši od napona pare u toku (1) za napajanje nazna en time, što je - poroznost porozne membrane (4) ve a od 0,7, gde se pod poroznoš u podrazumeva odnos otvorene zapremine prema ukupnoj zapremini porozne membrane (4), - razvijena površiona površine kondenzatora (2) 1,2 do 6 puta, po eljno 2 do 3 puta, ve a od razvijene površine poroznbe mebrane (4). - efektivna razlika lokalnih napona pare izme u toka (3) retentata i toka (10) kondeznata manja od 10 kPa (0,1 bar), po eljno manja od 4 kPa (0,05 bar), - primljena toplota toka (10) destilata oslobo ena razmenom toplote sa tokom (1) za napajanje i/ili tokom (3) retentata, po eljno sa tokom (3) retentata, - relacija izme u poroznosti membrane (4) odnosa S izme u razvijene površine kondenzatora i razvijene površine membrane, lokalne razlike napona pare D izme u retentata i napajanja, u kPa, širine L gasnog zazora, u cm, i odnosa P izme u apsolutnog pritiska u gasnom zazoru i lokalnog napona pare vode i retentatu, kao što sledi: ( . S6)/(D . L . P2 ) > 1 (po eljno > 2) - i što je gubitak primljene toplote toka (3) retentata manji od 300 kJ/kg kondenzata (manje od 12% latente toplote), a specifi ni protok je ve i od 0,5 kg (po eljno ve i od 1,0 kg) kondenzata / m2 membrane/ h / kPa razlike napona pare vode.
The following process steps are carried out in order to purify a liquid by membrane distillation, in particular to produce desalinated water from seawater or brackish water or process water:passing a relatively warn vaporising stream of liquid (retentate stream) over a po |
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The following process steps are carried out in order to purify a liquid by membrane distillation, in particular to produce desalinated water from seawater or brackish water or process water:passing a relatively warn vaporising stream of liquid (retentate stream) over a porous membrane, vapour flowing via the pores of the membrane to the other side of said membrane, andcondensing said vapour on a relatively cool condenser surface to give a distillate stream, said condenser surface forming the non-porous separation between a feed stream to be purified and said distillate steam, which feed stream is in counter-current with the retentate stream so that an appreciable proportion of the latent heat will be transferred via vapour to the feed stream, and a gas gap with a width of less than 5 mm being present between the porous membrane and the condenser surface.In order to improve the distillate flow rate per unit driving force, a pressure which is lower than the atmospheric pressure and higher than the vapor pressure of the feed stream is maintained in the gas gap, the porosity epsilon of the porous membrane is higher than 0.7, porosity being understood to be the ratio of the open volume to the total volume of the porous membrane, the surface area of the condenser surface is 1.2 to 6 times, preferably 2 to 3 times, the surface area of the porous membrane, the effective local vapour pressure difference between the retentate seam and the condensing stream is less than 10 kPa (0.1 bar), preferably less than 5 kPa (0.05 bar) and the perceptible heat of the distillate stream is released by heat exchange to the feed stream and/or the retentate stream, with preference for the retentate stream.</description><language>eng ; srp</language><subject>CHEMISTRY ; METALLURGY ; PERFORMING OPERATIONS ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; SEPARATION ; TRANSPORTING ; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE</subject><creationdate>2008</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=20080807&DB=EPODOC&CC=RS&NR=49810B$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20080807&DB=EPODOC&CC=RS&NR=49810B$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>HANEMAAIJER JAN HENDRIK</creatorcontrib><creatorcontrib>VAN HEUVEN JAN WILLEM</creatorcontrib><title>METHOD FOR THE PURlFICATION OF A LIQUID BY MEMBRANE DISTILLATION, IN PARTICULAR FOR THE PRODUCTION OF DESALINATED WATER FROM SEA WATER OR BRACKISH WATER OR PROCESS WATER</title><description>Postupak za pre iš avanje te nosti membranskom destilacijom, a naro ito za proizvodnju desalinizovane vode iz morske vode ili slane vode ili procesne vode, koji se sastoji od: - propuštanja relativno toplog toka isparljive te nosti tj. toka (3) retentata iznad porozne membrane (4), prolaska pare kroz pore membrane na drugu stranu pomenute membrane, - kondenzovanja pomenute pare na relativno hladnoj površini kondenzatora (2), daju i tok (10) destilata, a pomenuta površina kondenzatora formira neporoznu pregradu izmedju toka (1) za napajanje koji treba da se pre isti, i pomenutog toka (10) destilata pri emu je tok (1) za napajanje protiv-strujan sa tokom (3) retentata, tako da se znatan deo latentne toplote prenese preko pare na tok (1) za napajanje, - izmedju porozne membrane (4) i površine kondenzatora (2) je prisutan gasni zazor (5), širine manje od 5 mm, - pritiska koji se odr ava u gasnom zazoru (5), koji je manji od atmosferskog pritiska, a viši od napona pare u toku (1) za napajanje nazna en time, što je - poroznost porozne membrane (4) ve a od 0,7, gde se pod poroznoš u podrazumeva odnos otvorene zapremine prema ukupnoj zapremini porozne membrane (4), - razvijena površiona površine kondenzatora (2) 1,2 do 6 puta, po eljno 2 do 3 puta, ve a od razvijene površine poroznbe mebrane (4). - efektivna razlika lokalnih napona pare izme u toka (3) retentata i toka (10) kondeznata manja od 10 kPa (0,1 bar), po eljno manja od 4 kPa (0,05 bar), - primljena toplota toka (10) destilata oslobo ena razmenom toplote sa tokom (1) za napajanje i/ili tokom (3) retentata, po eljno sa tokom (3) retentata, - relacija izme u poroznosti membrane (4) odnosa S izme u razvijene površine kondenzatora i razvijene površine membrane, lokalne razlike napona pare D izme u retentata i napajanja, u kPa, širine L gasnog zazora, u cm, i odnosa P izme u apsolutnog pritiska u gasnom zazoru i lokalnog napona pare vode i retentatu, kao što sledi: ( . S6)/(D . L . P2 ) > 1 (po eljno > 2) - i što je gubitak primljene toplote toka (3) retentata manji od 300 kJ/kg kondenzata (manje od 12% latente toplote), a specifi ni protok je ve i od 0,5 kg (po eljno ve i od 1,0 kg) kondenzata / m2 membrane/ h / kPa razlike napona pare vode.
The following process steps are carried out in order to purify a liquid by membrane distillation, in particular to produce desalinated water from seawater or brackish water or process water:passing a relatively warn vaporising stream of liquid (retentate stream) over a porous membrane, vapour flowing via the pores of the membrane to the other side of said membrane, andcondensing said vapour on a relatively cool condenser surface to give a distillate stream, said condenser surface forming the non-porous separation between a feed stream to be purified and said distillate steam, which feed stream is in counter-current with the retentate stream so that an appreciable proportion of the latent heat will be transferred via vapour to the feed stream, and a gas gap with a width of less than 5 mm being present between the porous membrane and the condenser surface.In order to improve the distillate flow rate per unit driving force, a pressure which is lower than the atmospheric pressure and higher than the vapor pressure of the feed stream is maintained in the gas gap, the porosity epsilon of the porous membrane is higher than 0.7, porosity being understood to be the ratio of the open volume to the total volume of the porous membrane, the surface area of the condenser surface is 1.2 to 6 times, preferably 2 to 3 times, the surface area of the porous membrane, the effective local vapour pressure difference between the retentate seam and the condensing stream is less than 10 kPa (0.1 bar), preferably less than 5 kPa (0.05 bar) and the perceptible heat of the distillate stream is released by heat exchange to the feed stream and/or the retentate stream, with preference for the retentate stream.</description><subject>CHEMISTRY</subject><subject>METALLURGY</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>SEPARATION</subject><subject>TRANSPORTING</subject><subject>TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2008</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqFjDsKwkAQhtNYiHoEYQ6goGih5WZ3Qgb3oftArEKQtQoaiJfyli4aSWkzP_M_vnH2UuhLI6AwFnyJcAy2KYgzT0aDKYCBpFMgAfkFFKrcMo0gyHmS8lNaAGk4MuuJB8nsALJGBP7DCHRMkmYeBZzTTT1rFDhk_ZtWic0P5MrBSQyOzn2NaTa61U0XZ71OsnmBnpfL2D6q2LX1Nd7js7Juu9-tV_nmX_4Glz9FpA</recordid><startdate>20080807</startdate><enddate>20080807</enddate><creator>HANEMAAIJER JAN HENDRIK</creator><creator>VAN HEUVEN JAN WILLEM</creator><scope>EVB</scope></search><sort><creationdate>20080807</creationdate><title>METHOD FOR THE PURlFICATION OF A LIQUID BY MEMBRANE DISTILLATION, IN PARTICULAR FOR THE PRODUCTION OF DESALINATED WATER FROM SEA WATER OR BRACKISH WATER OR PROCESS WATER</title><author>HANEMAAIJER JAN HENDRIK ; VAN HEUVEN JAN WILLEM</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_RS49810B3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; srp</language><creationdate>2008</creationdate><topic>CHEMISTRY</topic><topic>METALLURGY</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</topic><topic>SEPARATION</topic><topic>TRANSPORTING</topic><topic>TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE</topic><toplevel>online_resources</toplevel><creatorcontrib>HANEMAAIJER JAN HENDRIK</creatorcontrib><creatorcontrib>VAN HEUVEN JAN WILLEM</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>HANEMAAIJER JAN HENDRIK</au><au>VAN HEUVEN JAN WILLEM</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>METHOD FOR THE PURlFICATION OF A LIQUID BY MEMBRANE DISTILLATION, IN PARTICULAR FOR THE PRODUCTION OF DESALINATED WATER FROM SEA WATER OR BRACKISH WATER OR PROCESS WATER</title><date>2008-08-07</date><risdate>2008</risdate><abstract>Postupak za pre iš avanje te nosti membranskom destilacijom, a naro ito za proizvodnju desalinizovane vode iz morske vode ili slane vode ili procesne vode, koji se sastoji od: - propuštanja relativno toplog toka isparljive te nosti tj. toka (3) retentata iznad porozne membrane (4), prolaska pare kroz pore membrane na drugu stranu pomenute membrane, - kondenzovanja pomenute pare na relativno hladnoj površini kondenzatora (2), daju i tok (10) destilata, a pomenuta površina kondenzatora formira neporoznu pregradu izmedju toka (1) za napajanje koji treba da se pre isti, i pomenutog toka (10) destilata pri emu je tok (1) za napajanje protiv-strujan sa tokom (3) retentata, tako da se znatan deo latentne toplote prenese preko pare na tok (1) za napajanje, - izmedju porozne membrane (4) i površine kondenzatora (2) je prisutan gasni zazor (5), širine manje od 5 mm, - pritiska koji se odr ava u gasnom zazoru (5), koji je manji od atmosferskog pritiska, a viši od napona pare u toku (1) za napajanje nazna en time, što je - poroznost porozne membrane (4) ve a od 0,7, gde se pod poroznoš u podrazumeva odnos otvorene zapremine prema ukupnoj zapremini porozne membrane (4), - razvijena površiona površine kondenzatora (2) 1,2 do 6 puta, po eljno 2 do 3 puta, ve a od razvijene površine poroznbe mebrane (4). - efektivna razlika lokalnih napona pare izme u toka (3) retentata i toka (10) kondeznata manja od 10 kPa (0,1 bar), po eljno manja od 4 kPa (0,05 bar), - primljena toplota toka (10) destilata oslobo ena razmenom toplote sa tokom (1) za napajanje i/ili tokom (3) retentata, po eljno sa tokom (3) retentata, - relacija izme u poroznosti membrane (4) odnosa S izme u razvijene površine kondenzatora i razvijene površine membrane, lokalne razlike napona pare D izme u retentata i napajanja, u kPa, širine L gasnog zazora, u cm, i odnosa P izme u apsolutnog pritiska u gasnom zazoru i lokalnog napona pare vode i retentatu, kao što sledi: ( . S6)/(D . L . P2 ) > 1 (po eljno > 2) - i što je gubitak primljene toplote toka (3) retentata manji od 300 kJ/kg kondenzata (manje od 12% latente toplote), a specifi ni protok je ve i od 0,5 kg (po eljno ve i od 1,0 kg) kondenzata / m2 membrane/ h / kPa razlike napona pare vode.
The following process steps are carried out in order to purify a liquid by membrane distillation, in particular to produce desalinated water from seawater or brackish water or process water:passing a relatively warn vaporising stream of liquid (retentate stream) over a porous membrane, vapour flowing via the pores of the membrane to the other side of said membrane, andcondensing said vapour on a relatively cool condenser surface to give a distillate stream, said condenser surface forming the non-porous separation between a feed stream to be purified and said distillate steam, which feed stream is in counter-current with the retentate stream so that an appreciable proportion of the latent heat will be transferred via vapour to the feed stream, and a gas gap with a width of less than 5 mm being present between the porous membrane and the condenser surface.In order to improve the distillate flow rate per unit driving force, a pressure which is lower than the atmospheric pressure and higher than the vapor pressure of the feed stream is maintained in the gas gap, the porosity epsilon of the porous membrane is higher than 0.7, porosity being understood to be the ratio of the open volume to the total volume of the porous membrane, the surface area of the condenser surface is 1.2 to 6 times, preferably 2 to 3 times, the surface area of the porous membrane, the effective local vapour pressure difference between the retentate seam and the condensing stream is less than 10 kPa (0.1 bar), preferably less than 5 kPa (0.05 bar) and the perceptible heat of the distillate stream is released by heat exchange to the feed stream and/or the retentate stream, with preference for the retentate stream.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE |
| title | METHOD FOR THE PURlFICATION OF A LIQUID BY MEMBRANE DISTILLATION, IN PARTICULAR FOR THE PRODUCTION OF DESALINATED WATER FROM SEA WATER OR BRACKISH WATER OR PROCESS WATER |
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