Nanofiltration (NF) yog cov txheej txheem ua kua dej sib cais uas muaj ntau yam khoom nrog rov qab osmosis (RO). Tsis zoo li RO, uas tsis lees paub yuav luag tag nrho cov kuab tshuaj yaj, NF tsis lees txais cov ions ntau yam xws li calcium thaum tsis lees txais cov ions monovalent xws li chloride.
Ntawm HID membraanes peb muab ib txoj kab ntawm nanofiltration (NF) daim nyias nyias uas tsim los muab kev pom zoo thiab tsis lees paub thiab yuav raug hloov kho kom tau raws li cov kev xav tau ntawm ntau yam txheej txheem kev siv. Peb cov nanofiltration membranes, uas muaj nyob rau hauv kauv-qhov txhab thiab pav ca daim ntawv membrane topologies, tej zaum yuav tsis lees txais cov ntsev ntau thiab cov molecules loj dua thaum xaiv tsis kam hloov cov qib ntawm cov ntsev monovalent.
Cov txheej txheem kev sib cais ntawm nanofiltration yog tus cwj pwm los ntawm cov organic, nyias-film composite daim nyias nyias nrog pore qhov ntau thiab tsawg ntawm 0.1 txog 10nm. NF daim nyias nyias, tsis zoo li thim rov qab osmosis (RO) daim nyias nyias, tuaj yeem ua haujlwm ntawm qhov qis qis thiab tso cai rau kev xaiv qhov tsis lees paub raws li qhov loj thiab nqi.
Peb cov nanofiltration daim nyias nyias, nrog qhov pore loj li ntawm 0.1 txog 10nm, tso cai rau dej thiab qee cov ntsev ntws los ntawm thaum khaws cov ions ntau, cov khoom hnyav molecular, carbohydrates, proteins, thiab lwm yam organic. HID's NFS, NFX, NFW, thiab NFG nanofiltration membrane cov khoom tau pom tias muaj kev tiv thaiv fouling zoo, kev xaiv siab, thiab lub cev muaj zog yuav tsum tau siv rau ntau yam kev lag luam sib cais tom qab xyoo ntawm kev tshawb fawb thiab kev loj hlob.
MgSO4 thiab lactose rejection yog zoo nyob rau hauv NFS, NFX, thiab NFW, whereas NFG ib nrab tshem tawm monosaccharides los ntawm oligosaccharides. Nanofiltration membranes kuj tseem tuaj yeem txo cov tawv tawv, nitrates, sulfates, tannins, turbidity, xim, TDS, thiab ntsev me ntsis hauv cov dej ntws.
Nanofiltration membranes yog ib qho kev tshawb pom tshiab uas muab kev xaiv ion zoo dua li rov qab osmosis membranes, uas tsis lees paub txhua hom ion hauv cov kwj dej. Qhov tshwj xeeb no tso cai rau kev hloov pauv ntau dua hauv kev sib cais txoj kev txhim kho, uas tuaj yeem muaj kev cuam tshuam loj rau kev ua haujlwm thiab kev lag luam, tshwj xeeb tshaj yog hauv kev lag luam. Nov yog qee qhov piv txwv ntawm peb cov NF membrane tshuab siv li cas:
- Lactose thiab whey demineralization hauv cov khoom noj mis nyuj
- Lactose thiab whey concentration
- Tshem tawm cov organic teeb meem hauv dej thiab kev kho dej khib nyiab
- Txo cov hardness hauv dej purification
- Sulfate tshem tawm ntawm cov dej hiav txwv thiab cov txheej txheem tshuaj
- Desalting ntawm cov txheej txheem ntws nyob rau hauv ntau yam industries
Post lub sij hawm: Jun-12-2022