Rov qab osmosis membrane (RO) lim caij
Lawm, kev khiav dej num ntawm cov dej yog los ntawm qhov qis concentration coj mus rau qhov siab concentration kev taw qhia, thiab rov qab osmosis membrane exerts txaus siab nyob rau hauv siab concentration sab kom cov dej ntws rov qab mus rau lwm sab ntawm daim nyias nyias.Lub rov qab osmosis membrane tuaj yeem khaws cov khoom loj dua 0.0001μm (piv txwv li 0.1nm) (xws li cov kab mob thiab cov kab mob thiab cov organic tshuaj uas muaj qhov hnyav molecular ntau dua 100) thiab tam sim no yog cov khoom lag luam zoo tshaj plaws ntawm cov khoom sib cais ntawm lub khw.Piv nrog rau lwm cov lim dej, cov dej ntws los ntawm qhov rov qab osmosis membrane yog purer.Tsis tas li ntawd, rov qab osmosis membranes kuj tsim cov dej khib nyiab.Lub membrane uas tsis tsim cov dej khib nyiab yuav tsum tsis yog rov qab osmosis membrane.
Nanofiltration membrane (NF) lim caij
Nanofiltration membranes feem ntau yog them rau daim nyias nyias, nrog cov nqi tsis zoo ntawm qhov chaw, uas tuaj yeem cuam tshuam cations nrog ntau tshaj ob lub valences hauv dej thiab khaws cov monovalent ions (xws li sodium ions thiab potassium ions).Yog li ntawd, nanofiltration membranes khaws qee cov zaub mov hauv dej.Khoom siv.
Ntawm cov khoom hnyav hlau hnyav, arsenic feem ntau muaj nyob hauv dej li trivalent arsenic ions thiab pentavalent arsenic ions;chromium feem ntau muaj nyob rau hauv daim ntawv ntawm trivalent thiab hexavalent ions nyob rau hauv qhov.Yog li cov nanofiltration membrane tseem tuaj yeem lim tawm feem ntau ntawm cov hlau hnyav.Nws tseem tuaj yeem tshem tawm ib feem ntawm calcium thiab magnesium, yog li nws muaj qee yam cuam tshuam hauv softening dej nyuaj.
Nyob rau tib lub sijhawm, nanofiltration membranes tuaj yeem txo cov organic teeb meem hauv dej thiab carcinogens xws li trihalomethanes uas tsim thaum lub sij hawm chlorination thiab tshuaj tua kab mob ntawm cov dej haus.
Tus kab mob me tshaj plaws uas paub muaj lub cheeb ntawm 18nm-22nm (cov ntaub ntawv los ntawm Wikipedia).Piv nrog rau qhov pore loj ntawm nanofiltration membranes ntawm 1-2nm, cov kab mob thiab cov kab mob no kuj loj, yog li nanofiltration membranes yuav ua tau zoo tshem tawm cov kab mob thiab cov kab mob tsis zoo li nyuaj rau xav txog.
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm nanofiltration membrane yog ib feem zoo ib yam li cov rov qab osmosis membrane.Lub siab nws dais yog qis dua qhov rov qab osmosis membrane, yog li nws tsim cov dej khib nyiab tsawg dua li rov qab osmosis membrane.
Ultrafiltration membrane (UF) lim caij
Qhov pore loj ntawm ultrafiltration membrane yog 0.01μm (10nm).Ntau lub tshuab lim dej yuav hais txog tias cov dej lim dej uas tsuas yog siv ultrafiltration membranes khaws cov zaub mov hauv dej thiab tsis tsim cov dej khib nyiab.Zoo, yog lawm.Tab sis ultrafiltration membranes tsis tuaj yeem lim tawm cov hlau hnyav.Nws tuaj yeem lim tawm cov kab mob zoo (cov kab mob me tshaj plaws yog 0.2μm (200nm) ntev) thiab qee cov kab mob loj.
Hauv qee thaj chaw, cov dej yog cov dej nyuaj, uas yog, cov dej uas muaj cov calcium thiab magnesium ntau.Cov dej no saj tsis zoo.Yog tias koj xav hloov nws mus rau hauv cov dej mos, lub tshuab lim dej siv tsuas yog cov membrane no tsis tuaj yeem ua tau raws li qhov xav tau.
Ceramic lim
Cov khoom siv lim dej ceramic tuaj yeem lim tawm cov khib nyiab, khib nyiab, thiab cov kab mob los ntawm cov pore me me ntawm cov khoom siv ceramic.Nws yog ib hom microfiltration membrane (MF).Cov nyiaj ions txuas nrog cov ceramic muaj cov nyhuv sterilizing.Hais txog qhov pom tseeb ntawm cov khoom siv lim dej ceramic, cov khoom siv dual-tswj daim nyias nyias ceramic lim caij nrog qhov pom tseeb tshaj plaws hauv ntiaj teb muaj qhov nruab nrab qhov pore loj ntawm 0.1μm.Raws li tus qauv no, txawm hais tias cov khoom lim ceramic tuaj yeem lim tawm cov kab mob, nws tsis tuaj yeem lim tawm ntau yam kab mob.
Ceramic nws tus kheej tsis tuaj yeem tshem tawm cov tshuaj lom neeg, tab sis cov khoom siv lim dej ceramic ua ke nrog kev ua haujlwm siab ua kom cov pa roj carbon monoxide tuaj yeem txo cov pa phem thiab cov pa phem hlau, thiab muaj lub luag haujlwm ntawm kev tshem tawm cov tshuaj chlorine thiab decoloring.Txawm li cas los xij, hom kev sib xyaw ceramic lim caij no yuav tsum tau hloov tsis tu ncua, vim hais tias txawm hais tias cov nplais ceramic yog yooj yim los ntxuav, cov pa roj carbon activated hauv cov ceramic yuav raug thaiv tom qab siv sijhawm.Yog tias koj xav txog nws, koj yuav paub tias cov nyhuv adsorption tsawg tsawg lossis tsis muaj Up.
Resin lim caij
Txau cov khoom lim dej feem ntau yog siv los ua kom cov dej tawv.Tsis tuaj yeem lim cov hlau hnyav.
Post lub sij hawm: Nov-12-2020