Ultrafiltration yog dab tsi? Ultrafiltration ua haujlwm li cas?
Ultrafiltration yog dab tsi?
Ultrafiltration membrane yog ib qho polymer semi-permeable membrane uas tuaj yeem thaiv cov polymer colloids lossis tshem tawm qhov nruab nrab ntawm li 0.002 thiab 0.1 μm thiab cais lawv los ntawm cov tshuaj. Txawm li cas los xij, me me molecules, soluble solids, inorganic ntsev, thiab lwm yam tuaj yeem dhau los ntawm ultrafiltration membrane pores.
Qhov ntxov tshaj plaws ultrafiltration membranes siv yog nyias nyias ntawm cov tsiaj nruab nrog cev, uas muaj ib tug me me daim ntawv thov ntau yam thiab kev loj hlob qeeb. Nws tsis yog txog thaum xyoo 1970 uas cov tshuab ultrafiltration tau nkag mus rau theem kev loj hlob sai nrog kev loj hlob ntawm kev tshawb fawb thiab thev naus laus zis.
Vim yog cov yam ntxwv ntawm ultrafiltration xws li cov cuab yeej yooj yim, me me hneev taw, tsis pom kev siab, thiab cov khoom siv tau yooj yim, nws daim ntawv thov ntau yam tau txuas ntxiv mus rau cov khoom siv hluav taws xob, tshuaj, dej haus, khoom noj, tshuaj, kev kho mob, kev kho dej khib nyiab thiab rov ua dua tshiab, thiab cov khoom thov kuj tau loj hlob sai heev.
Ultrafiltration ua haujlwm li cas?
Ultrafiltration membrane yog microporous filtration membrane nrog cov pore loj specifications thiab cov pore loj npaum li cas ntawm 0 001-0.02 microns. Txoj kev lim dej membrane siv qhov sib txawv raws li lub zog tsav tsheb hu ua ultrafiltration membrane filtration.
Thaum qhov ntsuas qhov pore loj npaum li cas ntawm daim nyias nyias siv raws li tus qauv sib txawv, daim nyias nyias pom nrog qhov sib txawv ntawm qhov sib txawv raws li kev tsav tsheb tuaj yeem muab faib ua:
Qhov ntsuas qhov pore loj ntawm microporous membrane (MF)yog 0.02~10um;
Ultrafiltration membrane (UF)yog {0}}.001~0.02 um;
Rov qab osmosis membrane (RO)yog {0}}.0001~0.001 um.
Lub pore loj ntawm lub ultrafiltration membrane tsuas yog ob peb nanometers mus rau kaum nanometers, uas txhais tau hais tias los ntawm kev siv lub siab tsim nyog ntawm ib sab ntawm daim nyias nyias, solute molecules loj dua qhov pore loj tuaj yeem raug tshuaj xyuas kom cais cov khoom uas muaj qhov hnyav molecular ntau dua. ntau tshaj 500 Daltons thiab ib qho me me loj dua 2 ~ 20 nanometers. Cov tshuaj macromolecular thiab cov khoom nyob rau hauv cov dej khib nyiab raug tshem tawm los ntawm kev siv cov khoom siv tshuaj ntsuam xyuas ntawm daim nyias nyias ntawm qhov pore loj, thaiv thiab retardation nyhuv ntawm daim nyias nyias pores, thiab adsorption ntawm impurities los ntawm daim nyias nyias thiab daim nyias nyias pores. Nws yog feem ntau ntseeg tias nws yog kev tshuaj ntsuam xyuas.
Nyob rau hauv qhov kev txiav txim ntawm sab nraud quab yuam, cov tshuaj sib cais ntws raws li qhov chaw ntawm lub ultrafiltration membrane ntawm ib tug tej yam txaus nqi. Cov kuab tshuaj uas tsis muaj molecular thiab inorganic ions nyob rau hauv cov tshuaj tau dhau los ntawm ultrafiltration membrane los ntawm high-pressure sab mus rau sab uas tsis muaj siab thiab raug tso tawm raws li filtrate. Nyob rau hauv sib piv, lub ultrafiltration membrane khaws cov macromolecular tshuaj, colloidal hais thiab microorganisms nyob rau hauv cov tshuaj, thiab cov tshuaj yog concentrated thiab tso tawm nyob rau hauv daim ntawv ntawm concentrated kua.
Dab tsi yog cov yam ntxwv ntawm ultrafiltration membrane?
1. Ultrafiltration membrane muaj tshuaj lom neeg ruaj khov thiab tiv taus kub, acid thiab alkali, yog li nws tsis xav tau dej zoo thiab muaj zog versatility.
2. Lub hauv paus ntsiab lus ntawm kev siv tshuab ultrafiltration membrane yog qhov yooj yim, yooj yim rau kev paub txog kev ua haujlwm tsis siv neeg, txuag kev ua haujlwm, thiab yooj yim rau kev khiav lag luam, yooj yim los tswj, kev nyab xeeb thiab ruaj khov.
3. Ultrafiltration membrane tshuab yog ib txoj kev siv lub cev. Tsis muaj cov tshuaj chemical uas yuav tsum tau ua thaum lub sijhawm kho dej, yog li nws tuaj yeem tiv thaiv kev ua qias tuaj thib ob ntawm lub cev dej.
4. Ultrafiltration membrane tshuab muaj kev ua haujlwm siab thiab kev kho dej loj, tshwj xeeb tshaj yog rau kev kho cov dej haus hauv nroog nrog cov pa phem tsawg, qhia txog kev ua haujlwm siab.
Kev ua tau zoo ntawm ultrafiltration membrane tshuab yog tas li txhim kho, thiab nws daim ntawv thov zoo nyob rau hauv ntau qhov chaw yog qhov tseem ceeb. Thaum siv ultrafiltration membrane, koj yuav tsum tau them sai sai rau kev saib xyuas txhua hnub ntawm cov txheej txheem membrane, ua kom ntev lub neej kev pab cuam ntawm daim nyias nyias, thiab tsim kom muaj txiaj ntsig ntau dua rau cov neeg siv.