Rov qab osmosis (RO) yog hais txog ib lub tshuab uas ntxuav cov dej los ntawm kev thawb nws los ntawm ib qho me me permeable nyob rau hauv siab. RO daim nyias nyias yog nyias txheej ntawm cov khoom lim uas cais cov kab mob sib kis thiab cov ntsev yaj los ntawm cov dej haus. Nws muaj peb txheej, uas yog lub web txhawb nqa polyester, micro-porous polysulfone interlayer thiab ib txheej ultra-thin polyamide barrier txheej. Cov membranes no tuaj yeem siv rau hauv ob qho tib si kev lag luam thiab kom tau txais cov dej haus. Niaj hnub no, lawv tau siv ntau dua thoob plaws ntiaj teb rau kev lim dej, vim tias cov txheej txheem RO muaj kev cuam tshuam rau ib puag ncig thiab muaj txiaj ntsig zoo rau cov txheej txheem siv cov txheej txheem xws li distillation. Tab sis tib neeg tsis tau siv tag nrho cov lus siv thiab nkag siab qhov sib txawv ntawm hom ro membranes.
Hauv tsab xov xwm niaj hnub no, peb yuav piav qhia luv luv ntawm qee cov ntsiab lus siv thiab qhov sib txawv ntawm RO daim nyias nyias. HID daim nyias nyias yog categorized los ntawm hom membrane, siv cov membrane, qhov loj, thiab kev ua haujlwm. Hauv peb lub vev xaib, daim nyias nyias tau muab faib ua peb pawg siv daim nyias nyias (GPD). Peb faib peb cov ro membranes raws li daim ntawv thov qhov ntau thiab tsawg thiab lawv cov GDP ntau. Rau thaj chaw ro daim nyias nyias ntawm HID, GPD ntau ntawm 50 - 200 thiab tuaj yeem tswj qhov siab ntawm 65psi mus rau qhov siab tshaj plaws ntawm 200psi. Peb muaj cov qauv dav lossis cov membranes no thiab koj tuaj yeem tshawb xyuas peb lub tsev los ntawm peb lub vev xaib. Cov membranes no tsim nyog thiab pom zoo siv hauv cov tshuab me me ro. vim yog lawv qhov qis qis thiab qib gpd.
Rau coj mus muag ro membranes ntawm HID, GPD ntau ntawm 200 - 1000 thiab tuaj yeem tswj tau qhov siab ntawm 65psi mus rau qhov siab tshaj plaws ntawm 200psi. Peb kuj muaj cov qauv dav rau cov membranes no. Cov membranes no tsim nyog siv rau hauv cov chaw pej xeem lossis chaw ua haujlwm hauv tsev, tsev kho mob, tsev kawm ntawv, chaw tsim khoom, chaw soj nstuam vim tias GPD rau cov membranes no muaj peev xwm ntau dua li cov tsev nyob. Lawv feem ntau yog siv rau desalination ntawm dej nto, dej hauv av, kais dej, brackish nrog salinity nyob rau hauv 2000ppm. Cov pab pawg thib peb yog cov txheej txheem kev lag luam, cov no yog cov loj loj, GPD, thiab yog tsim los rau cov tshuab loj. Los ntawm 780 - 11000 nkas loos ib hnub, cov no tuaj yeem siv rau desalination ntawm seawater thiab siab concentration brackish dej thiab tuaj yeem tswj tau qhov siab ntawm 150psi mus rau qhov siab tshaj 600psi. Peb yuav qhia cov ncauj lus kom ntxaws ntxiv rau txhua pawg hauv peb tsab xov xwm tom ntej.
Cov ntsiab lus tseem ceeb siv hauv qhov rov qab osmosis
Rov qab - qhov feem pua ntawm cov txheej txheem membrane pub dej uas tawm ntawm qhov system raws li cov khoom siv dej lossis "permeate".
Kev tsis lees paub - feem pua ntawm cov ntsiab lus ntawm cov kua dej tawm ntawm qhov system pub dej los ntawm daim nyias nyias.
Txoj Kev - qhov ntxeev ntawm "kev tsis lees paub", qhov kev tso cai yog feem pua ntawm cov khoom pov tseg (cov kab mob sib kis) hauv cov dej pub pub nkag mus rau hauv daim nyias nyias.
Flow - Feed flow yog tus nqi ntawm cov dej pub nkag mus rau cov txheej txheem membrane lossis membrane system, feem ntau ntsuas hauv nkas loos ib feeb (gpm).
Concentrate flow - yog tus nqi ntws ntawm cov dej uas tsis yog-permeated pub dej uas tawm hauv lub cev los yog cov txheej txheem membrane.
Flux - tus nqi ntawm permeate thauj mus rau ib chav tsev ntawm daim nyias nyias, feem ntau ntsuas nyob rau hauv nkas loos ib square feet ib hnub twg (gfd) los yog litres ib square meter thiab teev (L/m2h).
Permeate - cov khoom purified dej ua los ntawm ib tug membrane system.
Total Dissolved Solids (TDS) - feem ntau qhia tau tias yog mg/lor ppm (them ib lab).
Post lub sij hawm: Nov-29-2021