SE457607B - DYNAMIC MEMBRANE FOR SEPARATION OF A LIQUID, AATMINSTONE MAINLY IN THE WATER EXISTING MEDIUM - Google Patents
DYNAMIC MEMBRANE FOR SEPARATION OF A LIQUID, AATMINSTONE MAINLY IN THE WATER EXISTING MEDIUMInfo
- Publication number
- SE457607B SE457607B SE8700811A SE8700811A SE457607B SE 457607 B SE457607 B SE 457607B SE 8700811 A SE8700811 A SE 8700811A SE 8700811 A SE8700811 A SE 8700811A SE 457607 B SE457607 B SE 457607B
- Authority
- SE
- Sweden
- Prior art keywords
- layer
- dynamic filter
- liquid medium
- substantially insoluble
- average particle
- Prior art date
Links
- 239000007788 liquid Substances 0.000 title claims description 17
- 239000012528 membrane Substances 0.000 title claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 13
- 238000000926 separation method Methods 0.000 title description 9
- 239000010410 layer Substances 0.000 claims description 57
- 239000011159 matrix material Substances 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 19
- 239000011236 particulate material Substances 0.000 claims description 11
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 239000007900 aqueous suspension Substances 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 239000002609 medium Substances 0.000 claims 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 6
- 239000004408 titanium dioxide Substances 0.000 claims 3
- 239000012736 aqueous medium Substances 0.000 claims 1
- 230000007062 hydrolysis Effects 0.000 claims 1
- 238000006460 hydrolysis reaction Methods 0.000 claims 1
- 238000006386 neutralization reaction Methods 0.000 claims 1
- 230000020477 pH reduction Effects 0.000 claims 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims 1
- 239000002002 slurry Substances 0.000 claims 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims 1
- 239000003921 oil Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000012466 permeate Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical class [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000035508 accumulation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- HDYRYUINDGQKMC-UHFFFAOYSA-M acetyloxyaluminum;dihydrate Chemical compound O.O.CC(=O)O[Al] HDYRYUINDGQKMC-UHFFFAOYSA-M 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229940009827 aluminum acetate Drugs 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- DKAGJZJALZXOOV-UHFFFAOYSA-N hydrate;hydrochloride Chemical compound O.Cl DKAGJZJALZXOOV-UHFFFAOYSA-N 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/08—Thickening liquid suspensions by filtration
- B01D17/085—Thickening liquid suspensions by filtration with membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/14—Dynamic membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/281—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling by applying a special coating to the membrane or to any module element
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Description
457 607 2 Som finfördelat partikelmaterial i dynamiska membran användes vanligen kiseldioxid eller zirkoniumdioxid. Silica or zirconia is usually used as finely divided particulate material in dynamic membranes.
Enligt den föreliggande uppfinningen har det visat sig möjligt att åstad- komma ett dynamiskt membran.genom vilket ett högt flöde kan upprätthållas för separering av ett åtminstone i huvudsak av vatten bestående, vätska- formigt medium från däri olösta beståndsdelar. vilket innefattar en vätskegenomsläpplig stödmatris med genomgående hål. i vars hal och på vars yta skikt av partikelmaterial är anordnade, kännetecknat därav. att i eller pà stödmatrisen är anordnat ett inre ämne med en medelpartikelstorlek av under 0.1 pm. Partikelmaterialet i det inre skiktet har företrädesvis en made lpartikelstorlek av 0,5-5 Fm. och medelpartikelstorleken för partikelmaterialet i det yttre skiktet.According to the present invention, it has been found possible to provide a dynamic membrane through which a high flow can be maintained for separating an at least substantially aqueous liquid medium from undissolved constituents therein. which comprises a liquid-permeable support matrix with through holes. in whose hall and on whose surface layers of particulate material are arranged, characterized therefrom. that in or on the support matrix is arranged an inner substance with an average particle size of less than 0.1 μm. The particulate material in the inner layer preferably has a made particle size of 0.5-5 microns. and the average particle size of the particulate material in the outer layer.
Partikelmaterialet i ett mellanskikt har företrädesvis en medelpartikel- storlek av 0,1-0,5 pm. 3 457 607 Stödmatrisen med genomgående hål kan med fördel bestå av en vävd eller filtad produkt med genomgående hål uppbyggd av fibrer av ett polymer- material såsom polyamid, polypropen, cellulosaacetat, polysulfon, poly- etylenglykoltereftalat eller polyuretan eller fibrer av ett metalliskt material såsom rostfritt stål eller av en naturfiber såsom bomull. Stöd- matrisen kan också bestå av en sintrad porös (genomgående porer) platta av metall såsom rostfritt stål eller av keramiskt material såsom aluminium- oxid eller av en porös film av ett polymermaterial, t ex något av ovan nämnda polymermaterial. De genomgående hålen har företrädesvis en storlek av 0,1-10 pm. Tjockleken hos stödmatrisen kan med fördel uppgå till 0.1-10 mm.The particulate material in an intermediate layer preferably has an average particle size of 0.1-0.5 μm. The support matrix with through holes may advantageously consist of a woven or felted product with through holes made of fibers of a polymeric material such as polyamide, polypropylene, cellulose acetate, polysulfone, polyethylene glycol terephthalate or polyurethane or fibers of a metallic material such as stainless steel. steel or of a natural fiber such as cotton. The support matrix may also consist of a sintered porous (continuous pores) plate of metal such as stainless steel or of ceramic material such as alumina or of a porous film of a polymeric material, for example one of the above-mentioned polymeric materials. The through holes preferably have a size of 0.1-10 μm. The thickness of the support matrix can advantageously amount to 0.1-10 mm.
Partikelmaterialet i det inre porösa skiktet består såsom framgår ovan av aluminiumhydroxid eller hydratiserad aluminiumoxid. Hydratiseringen kan ske genom att oxiden själv tar upp vatten på ytan. Porstorleken i det inre porösa skiktet uppgår företrädesvis till 0,1-1 Fm och tjockleken hos skiktet med fördel till 5-100 pm. Detta inre skikt är vattenrikt. har god vattengenomsläpplighet och är hydrofilt.The particulate material in the inner porous layer consists, as shown above, of aluminum hydroxide or hydrated alumina. The hydration can take place by the oxide itself absorbing water on the surface. The pore size in the inner porous layer preferably amounts to 0.1-1 μm and the thickness of the layer advantageously to 5-100 μm. This inner layer is rich in water. has good water permeability and is hydrophilic.
Partikelmaterialet i det yttre porösa skiktet och i ett eller flera eventuellt förekommande porösa mellanskikt kan bland annat bestå av en oorganisk oxid såsom en oxid av kisel, titan eller zirkonium eller av i vatten olösliga oorganiska salter såsom sulfater eller karbonater, t ex bariumsulfat, kalciumsulfat. bariumkarbonat eller kalciumkarbonat.The particulate material in the outer porous layer and in one or more optionally present porous intermediate layers may consist, inter alia, of an inorganic oxide such as an oxide of silicon, titanium or zirconium or of water-insoluble inorganic salts such as sulphates or carbonates, eg barium sulphate, calcium sulphate. barium carbonate or calcium carbonate.
Porstorleken i det yttre porösa skiktet uppgår företrädesvis till 0.005-0,1 pm och tjockleken hos skiktet med fördel till 1-20 pm.The pore size in the outer porous layer preferably amounts to 0.005-0.1 μm and the thickness of the layer advantageously to 1-20 μm.
Porstorleken i ett mellanskikt uppgår företrädesvis till 0,02-0,5 hm och tjockleken med fördel till 1-20 pm. Yttre skikt och mellanskikt har en mekaniskt stabiliserande inverkan på det inre, vattenhållande skiktet.The pore size in an intermediate layer preferably amounts to 0.02-0.5 hm and the thickness advantageously to 1-20 μm. The outer layer and intermediate layer have a mechanically stabilizing effect on the inner, water-retaining layer.
Det yttre skiktet ger en mycket jämn yta, vilket minskar igensättnings- risken för eventuella fasta partiklar. Detta gäller speciellt vid kors- flödesfiltrering. Vid separering av olja ur vatten bildas en mycket tunn oljefilm på ytan som minskar slitaget på membranets yta. medan olja aldrig tränger djupare ner i det inre porösa skiktet och blockerar dess kanaler på djupet.The outer layer provides a very smooth surface, which reduces the risk of clogging of any solid particles. This is especially true for cross-flow filtering. When separating oil from water, a very thin oil film is formed on the surface which reduces the wear on the surface of the membrane. while oil never penetrates deeper into the inner porous layer and blocks its channels deeply.
Det yttre skiktet är i sig själv hydrofilt men kan behandlas för att ge det en mer eller mindre hydrofob yta om det med hänsyn till separerings- 457 607 4 En särskilt värdefull egenskap hos filtret enligt uppfinningen är att det vid behov kan regenereras genom avskrapning.The outer layer is itself hydrophilic but can be treated to give it a more or less hydrophobic surface if, with regard to separation, a particularly valuable property of the filter according to the invention is that it can be regenerated by scraping if necessary.
Uppfinningen skall förklaras närmare under hänvisnin g till bifogade rit- ning. i vilken fig 1 visar en separationsanordning med ett dynamiskt membran enligt den föreliggande uppfinningen i ett rens väggar med icke visade tätningar.The invention will be explained in more detail with reference to the accompanying drawing. in which Fig. 1 shows a separation device with a dynamic membrane according to the present invention in the walls of a cleaner with seals (not shown).
Varje dynamiskt membran består av en porös stödmatris lla resp l2a av en finmaskig vävduk med en central rund urtagning llal resp 12a1 och av skikt llb resp 12b av finfördelade partikelmaterial av i fig 3 och Ä illustrerat slag. Kammaren är vid en d ett inlopp 13 för vätskeformigt medium som anordningen och vid en diametralt motsatt ed ett utlopp 14 för den del av det tillförda förbi de dynamiska filtren. Inloppet 13 och punkt på mantelytan försedd me punkt pà mantelytan försedd m , permeat, som passerar de dynamiska membra- ammarens ändvaggar 18 och 19. Kanalerna 17 är anordnade i förbindelse med ett utlopp 20 för permeat. nen går ut i kanaler 17 i k I kammaren 10 är anordnad en rotor 21, i det exemplifierade fallet omfattande en rotationsaxel 21a, vars centrumlinje sammanfaller med den cylindriska kammarens symetriaxel, och två vingar eller blad 21b.Each dynamic membrane consists of a porous support matrix 11a and 12a, respectively, of a fine-meshed fabric with a central round recess 11a and 12a1, respectively, and of layers 11b and 12b, respectively, of finely divided particulate materials of the type illustrated in Figs. The chamber is at one d an inlet 13 for liquid medium as the device and at a diametrically opposite ed an outlet 14 for the part of it supplied past the dynamic filters. The inlet 13 and point on the mantle surface are provided with a point on the mantle surface provided with permeate, which passes the end walls 18 and 19 of the dynamic membrane breasts. The channels 17 are arranged in connection with an outlet 20 for permeate. The chamber 10 is provided with a rotor 21, in the exemplary case comprising a axis of rotation 21a, the center line of which coincides with the axis of symmetry of the cylindrical chamber, and two wings or blades 21b.
Rotoraxeln är med icke visade tätande lager lagrad i kammarens väggar. 5 457 607 Då separationsanordningen är i funktion ledes det vätskeformiga mediet med olösta beståndsdelar som skall underkastas rening via inloppet 13 konti- nuerligt in i separationsanordningens kammare 10. Vätskan kan t ex bestå av vatten innehållande oljedroppar och fasta partiklar, såsom oljehaltigt vatten från oljeraffinaderier eller oljeplattformar eller avfallsvatten från verkstäder med skärande bearbetning. Huvuddelen av vattnet passerar de dynamiska membranen 11 och 12 som ett permeatflöde och kan normalt via utloppet 20 ledas till en recipient. Återstàende vätska, rejectflödet, ledes ut via utloppet 14 och aterledes till det förorenade utgàngsmate- rialet eller underkastas en efterbehandling, som i de flesta fall är enkel. Under det beskrivna förloppet upprätthålles en tryckskillnad av företrädesvis 0,03-0,3 Ma mellan medierna på ömse sidor om ett dynamiskt membran. De olösta beståndsdelar som successivt ackumuleras på de dyna- miska membranen avlägsnas med rotorn 21, när beläggningarna av de olösta beståndsdelarna utgör ett för stort motstånd mot permeatflödet för att separeringen skall kunna utföras med ett kommersiellt tillfredsställande resultat.The rotor shaft is with not shown sealing bearings mounted in the walls of the chamber. When the separation device is in operation, the liquid medium with undissolved constituents to be subjected to purification is led via the inlet 13 continuously into the chamber 10 of the separation device. The liquid may, for example, consist of water containing oil droplets and solid particles, such as oily water from oil refineries or oil rigs or waste water from cutting processing workshops. The main part of the water passes the dynamic membranes 11 and 12 as a permeate flow and can normally be led via the outlet 20 to a recipient. The remaining liquid, the reject flow, is discharged via the outlet 14 and returned to the contaminated starting material or is subjected to a post-treatment, which in most cases is simple. During the described process, a pressure difference of preferably 0.03-0.3 Ma is maintained between the media on either side of a dynamic membrane. The undissolved constituents which gradually accumulate on the dynamic membranes are removed with the rotor 21, when the coatings of the undissolved constituents constitute too great a resistance to the permeate flow for the separation to be carried out with a commercially satisfactory result.
I de i fig 3 och 4 visade fallen består stödmatrisen lla av en väv av polyamid. Väven har en tjocklek av 0,2 mm och de genomgående hålen 22 en storlek av 5 pm. Det inre porösa skiktet llba består av partiklar av aluminiumhydroxid med en medelpartikelstorlek av omkring 1 pm. Tjockleken hos skiktet llba är genomsnittligt 40 pm. Skiktet appliceras på stöd- matrisen genom att en vattensuspension av Al(0H)3 suges genom stödmatrisen till dess den av stödmatrisen upptagna mängden Al(0H)3 uppgår till 25 g/mä Vattensuspensionen av Al(OH)3 kan framställas genom upplösning av 6 viktdelar aluminiumacetat i 100 viktdelar saltsurt vatten till pH 1,5 samt utfällning av aluminiumhydroxiden under kraftig omrörning vid en tempera- tur under 50 OC med ammoniak med justering av pH till 7,5. Därefter appli- ceras i det i fig 4 visade fallet mellanskiktet 11bc bestående av partik- lar av kiseldioxid med en medelpartikelstorlek av 0,2 pm på analogt sätt genom att en vattensuspension av sådana partiklar suges genom stödmatri- sen med anbringat inre skikt llba till dess den upptagna mängden S102 uppgår till 6 g/m2 och tjockleken hos det därvid bildade porösa skiktet llbc till omkring 10 pm. Vattensuspensionen kan framställas genom att 250 volymdelar vatten, 35 volymdelar 25-procentig ammoniak, 500 volymdelar etanol och 120 volymdelar tetraetylortosilikat blandas och omskakas under 2 tim och blandningen därefter neutraliseras till pH 7 med saltsyra. Slut- ligen appliceras det yttre skiktet llbb på stödmatrisen lla med skiktet 457 607 6 llba i fallet enligt fig 3 resp med skikten llba och llbc i fallet enligt fig Ü genom att en vattensuspension av kiseldioxi storlek hos partiklarna av 0,08 pm suges genom stödmatrisen till dess den av stödmatrisen upptagna mängden SiO2 uppgår till 3 g/m2 och skiktets tjocklek uppgår till 5 Fm. Denna vattensuspension av kiseldioxid kan framställas genom blandning av 2 volymdelar m volymdelar etanol och 4 volymdelar tetrapent av skikten llba. ättad ammoniumhydroxid, 50 ylortosilikat. Appliceringen llbb och llbc kan utföras antingen innan eller efter det stödmatrisen placerats i separationsanordningen. Det är möjligt att applicera en del av skikten, t ex skikten llba och llbb, på stödmatrisen skikten, t ex skiktet llbc, ingen. utanför separationsanordningen och en del av med stödmatrisen placerad i separationsanordn Som tidigare nämnts användes rotorn 21 för att avlägsna på de dynamiska membranen ackumulerade beläggningar. Därvid utn yttjas rotorns vingar 2lb som avskrapare.In the cases shown in Figs. 3 and 4, the support matrix 11a consists of a polyamide fabric. The fabric has a thickness of 0.2 mm and the through holes 22 a size of 5 μm. The inner porous layer 11ba consists of particles of aluminum hydroxide having an average particle size of about 1 μm. The thickness of the layer llba is on average 40 μm. The layer is applied to the support matrix by sucking an aqueous suspension of Al (OH) 3 through the support matrix until the amount of Al (OH) 3 taken up by the support matrix amounts to 25 g / m. The aqueous suspension of Al (OH) 3 can be prepared by dissolving 6 parts by weight of aluminum acetate in 100 parts by weight of hydrochloric acid water to pH 1.5 and precipitation of the aluminum hydroxide with vigorous stirring at a temperature below 50 ° C with ammonia with adjustment of pH to 7.5. Then, in the case shown in Fig. 4, the intermediate layer 11bc consisting of particles of silica with an average particle size of 0.2 μm is applied in an analogous manner by sucking an aqueous suspension of such particles through the support matrix with applied inner layer 11ba until the absorbed amount of S102 amounts to 6 g / m 2 and the thickness of the porous layer 11bc formed thereby to about 10 μm. The aqueous suspension can be prepared by mixing 250 parts by volume of water, 35 parts by volume of 25% ammonia, 500 parts by volume of ethanol and 120 parts by volume of tetraethylorthosilicate and shaking for 2 hours and then mixing the mixture to pH 7 with hydrochloric acid. Finally, the outer layer 11b is applied to the support matrix 11a with the layer 457 607 6 llba in the case according to Fig. 3 and with the layers 11a and 11bc in the case according to Fig. Ü by sucking an aqueous suspension of silica size of the particles of 0.08 μm through the support matrix until the amount of SiO2 taken up by the support matrix amounts to 3 g / m2 and the thickness of the layer amounts to 5 Fm. This aqueous suspension of silica can be prepared by mixing 2 parts by volume of ethanol and 4 parts of tetrapent by volume of layers 11ba. saturated ammonium hydroxide, 50 yl orthosilicate. The application llbb and llbc can be performed either before or after the support matrix is placed in the separation device. It is possible to apply some of the layers, for example the layers llba and llbb, to the support matrix layers, for example the layer llbc, none. outside the separation device and a part of the support matrix placed in the separation device As previously mentioned, the rotor 21 is used to remove accumulations on the dynamic membranes. In this case, the wings 2lb of the rotor are used as scrapers.
De görs därvid av ett mot de dynamiska membranerna skon- samt material, såsom gummi, polytetrafluoreten eller annat polymermate- rial, och anordnas rörliga relativt membranerna i en mot membranerna vinkelrat riktning. Nämnda rörlighet kan åstadkommas antingen genom att rotoraxeln Zla med rotor göres förskjutbar i en stationërt anordnad kammare 10 eller att kammaren göres försk jutbar utefter en i rotoraxelns längsriktning'stationärt anordnad rotor.They are then made of a material gentle on the dynamic membranes, such as rubber, polytetrafluoroethylene or other polymeric material, and are arranged movable relative to the membranes in a direction perpendicular to the membranes. Said mobility can be achieved either by making the rotor shaft Z1a with rotor displaceable in a stationary chamber 10 or by making the chamber displaceable along a rotor arranged stationary in the longitudinal direction of the rotor shaft.
Rotorn kan utnyttjas för regenerering av de d rotorvingarna bringas i kontakt med skiktet 1 flyttas längs stödmatrisen. llbc samt eventuellt en del ynamiska membranen genom att lb på stödmatrisen och för- Lämpligen avlägsnas dax-via skikten 11th att; av skiktet llba i samband med att beläggning- arna av det vätskeformiga mediets olösta beståndsdelar avlägsnas från sätt för återställande av skiktet llba. Därefter anbringas skikten llbc och llbb på tidigare beskrivet sätt med användande av tidigare beskrivna suspensioner av kiseldioxid.The rotor can be used for regeneration of the rotor blades brought into contact with the layer 1 moved along the support matrix. llbc and possibly some ynamic membranes by lb on the support matrix and preferably removed dax-via the layers 11th that; of the layer 11ba in connection with the coatings of the undissolved constituents of the liquid medium being removed from the method of restoring the layer 11ba. Thereafter, layers 11bc and 11b are applied in the manner previously described using previously described suspensions of silica.
CTG-SG från Aluminium Corp of America) eller en blandning av nämnda hydratiserade aluminiumoxid och aluminiumhydroxi d. En sådan blandning kan framställas genom att 25 viktdelar av den hydrat iserade oxiden slammas upp d med en medelpartikel- *CTG-SG from Aluminum Corp of America) or a mixture of said hydrated alumina and aluminum hydroxy d. Such a mixture can be prepared by slurrying 25 parts by weight of the hydrated oxide d with an average particle- *
Claims (13)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8700811A SE457607B (en) | 1987-02-26 | 1987-02-26 | DYNAMIC MEMBRANE FOR SEPARATION OF A LIQUID, AATMINSTONE MAINLY IN THE WATER EXISTING MEDIUM |
| NO880817A NO165947C (en) | 1987-02-26 | 1988-02-24 | DYNAMIC MEMBRANE FOR SEPARATION OF A LIQUID MEDIUM FROM UNSOLUTED INGREDIENTS IN THIS. |
| GB08804412A GB2201355A (en) | 1987-02-26 | 1988-02-25 | A porous membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8700811A SE457607B (en) | 1987-02-26 | 1987-02-26 | DYNAMIC MEMBRANE FOR SEPARATION OF A LIQUID, AATMINSTONE MAINLY IN THE WATER EXISTING MEDIUM |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| SE8700811D0 SE8700811D0 (en) | 1987-02-26 |
| SE8700811L SE8700811L (en) | 1988-08-27 |
| SE457607B true SE457607B (en) | 1989-01-16 |
Family
ID=20367679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8700811A SE457607B (en) | 1987-02-26 | 1987-02-26 | DYNAMIC MEMBRANE FOR SEPARATION OF A LIQUID, AATMINSTONE MAINLY IN THE WATER EXISTING MEDIUM |
Country Status (3)
| Country | Link |
|---|---|
| GB (1) | GB2201355A (en) |
| NO (1) | NO165947C (en) |
| SE (1) | SE457607B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5196380A (en) * | 1991-06-06 | 1993-03-23 | Arizona Board Of Reagents | Reactive membrane for filtration and purification of gases of impurities |
| US5637544A (en) * | 1991-06-06 | 1997-06-10 | Arizona Board Of Regents On Behalf Of The University Of Arizona | Reactive membrane for filtration and purification of gases of impurities and method utilizing the same |
| DE4120971A1 (en) * | 1991-06-25 | 1993-01-28 | Thomas Handtmann | FILTERING METHOD AND FILTERING DEVICE FOR FILTERING LIQUIDS |
| US5679249A (en) | 1991-12-24 | 1997-10-21 | Pall Corporation | Dynamic filter system |
| DE4210413C2 (en) * | 1992-03-30 | 1994-10-13 | Willi Keutmann | Device for the purification of oil-containing waste water and method for the production of this device |
| US6117322A (en) | 1993-06-23 | 2000-09-12 | Pall Corporation | Dynamic filter system |
| KR19990008289A (en) * | 1995-05-03 | 1999-01-25 | 와이너 길버트 피. | Apparatus and methods related to filtration and / or purification of fluids |
| TW434278B (en) * | 1997-04-08 | 2001-05-16 | Toyo Engineering Corp | Method of continuously dissolving rubber |
| US7465692B1 (en) | 2000-03-16 | 2008-12-16 | Pall Corporation | Reactive media, methods of use and assemblies for purifying |
| US7588686B2 (en) | 2002-06-26 | 2009-09-15 | University Of Copenhagen | Dual porosity filter |
| FR2938199B1 (en) * | 2008-11-07 | 2011-11-25 | Technlologies Avancees Et Membranes Ind | FILTRATION MEMBRANE HAVING ENHANCED ABRASION RESISTANCE |
| CN111392818A (en) * | 2020-02-12 | 2020-07-10 | 中国海洋石油集团有限公司 | Dynamic membrane for treating oily sewage and preparation method and application thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB501334A (en) * | ||||
| DE2226324C3 (en) * | 1972-06-06 | 1982-02-25 | Institut gornogo dela Sibirskogo otdelenija Akademii Nauk SSSR, Novosibirsk | Methods for purifying tap water |
| NL179546C (en) * | 1973-05-10 | Union Carbide Corp | MODULE FOR USE IN AN ULTRAFILTRATION DEVICE. |
-
1987
- 1987-02-26 SE SE8700811A patent/SE457607B/en not_active IP Right Cessation
-
1988
- 1988-02-24 NO NO880817A patent/NO165947C/en not_active IP Right Cessation
- 1988-02-25 GB GB08804412A patent/GB2201355A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NO165947B (en) | 1991-01-28 |
| NO165947C (en) | 1991-05-08 |
| GB2201355A (en) | 1988-09-01 |
| SE8700811D0 (en) | 1987-02-26 |
| GB8804412D0 (en) | 1988-03-23 |
| NO880817D0 (en) | 1988-02-24 |
| SE8700811L (en) | 1988-08-27 |
| NO880817L (en) | 1988-08-29 |
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