Hauv kev kho dej hauv kev lag luam, rov qab osmosis (RO) daim nyias nyias ua raws li 'lub raum' ntawm lub kaw lus, ua cov haujlwm tseem ceeb ntawm desalination thiab purification. Txawm li cas los xij, tom qab lub sijhawm ua haujlwm, kev poob qis hauv kev tsim cov dej thiab qhov nce hauv kev ua haujlwm siab feem ntau dhau los ua kev txhawj xeeb loj. Cov phenomena no feem ntau yog teeb liab ntawm daim nyias nyias fouling.Yuav ua li cas ib tug zoo tiv thaiv thiab tswj fouling kom ntev kev pab cuam lub neej ntawm daim nyias nyias? Qhov tseem ceeb nyob rau hauv kev nkag siab txog qhov ua rau fouling thiab siv lub tswv yim zoo uas ua ntej kev tiv thaiv, ntxiv los ntawm kev tu.
► I. Txheeb xyuas Cov Teeb Meem: Koj Cov Membrane Tej zaum "Kev Laus"
Thaum rov qab osmosis system pom cov cim hauv qab no, nws yuav tsum tau ceev faj txog qhov tshwm sim ntawm daim nyias nyias fouling:
Ib qho tseem ceeb txo qis hauv permeate flow:Nyob rau hauv tib lub siab, tus nqi ntawm purified dej uas tsim ib chav tsev ntawm lub sij hawm yog txo.
Kev nce hauv qhov system ua haujlwm siab: Txhawm rau tswj cov dej permeate, lub kaw lus yuav tsum tau nce siab dua, ua rau muaj zog siv zog ntxiv.
Fluctuation nyob rau hauv ntsev rejection tus nqi:Cov ntsiab lus ntsev (conductivity) nyob rau hauv cov khoom dej abnormally nce, qhia ib tug deterioration ntawm dej zoo.
Cov kev hloov no qhia tau hais tias lub membrane nto los yog ntws raws tej zaum yuav raug thaiv los ntawm ntau yam impurities, impairing nws ib txwm sib cais muaj nuj nqi.
► II. Kev Tiv Thaiv Kev Tiv Thaiv: Khaws cov kab mob kom deb ntawm Membrane Deg
Txoj kev pheej yig tshaj plaws thiab zoo tshaj plaws yog los tiv thaiv cov pa phem los ntawm kev tso rau ntawm daim nyias nyias, uas yog ua tiav los ntawm kev ua kom zoo ntawm cov dej pub.
Txhim kho Pretreatment:Nov yog thawj kab ntawm kev tiv thaiv fouling. Rau cov dej pub mis nrog cov organic lossis microbial cov ntsiab lus, xws li cov dej nyoos rau qee qhov kev lag luam rov qab osmosis los yog pharma ro cog,Cov txheej txheem oxidative pretreatment tuaj yeem txiav txim siab. Los ntawm kev ntxiv cov oxidants muaj kev ruaj ntseg, nws muaj peev xwm degrade loj - cov organic teeb meem molecule thiab inhibit microbial kev ua si hauv dej, yog li txo qhov yuav tshwm sim ntawm lawv tom qab adhesion rau daim nyias nyias.
Xaiv Anti-Fouling Membrane Elements: Kev txhim kho thev naus laus zis tau ua rau kev txhim kho hauv cov ntaub ntawv membrane. Hauv kev ua lag luam,muaj cov txheej txheem membrane nrog txhim kho deg hydrophilicity lossis anti- fouling txheej.Cov hom membranes no tuaj yeem txo cov pa phem adsorption thiab tshwj xeeb tshaj yog haum rau cov dej tsis zoo uas cuam tshuam rau kev lom neeg lossis cov organic fouling, txhim kho lub cev fouling tsis kam los ntawm cov khoom siv kho vajtse.
Optimizing Kev Ua Haujlwm Parameter: Kev tswj hwm tus nqi tsim nyog rov qab los thiab kev khiav hauj lwm flux yog qhov tseem ceeb heev.Zam kev ua haujlwm ntev - lub sijhawm ua haujlwm ntawm cov dej ntws ntau dhau tuaj yeem txo tus nqi ntawm cov kab mob sib kis thiab tso tawm ntawm daim nyias nyias, tsim kom muaj txiaj ntsig zoo rau kev ua haujlwm ruaj khov.
► BAB III. Yuav tsum tau ntxuav: Restoring Membrane Element Performance
Txawm tias muaj kev tiv thaiv zoo, me me fouling tseem yuav sau. Thaum kev ua haujlwm poob qis los ntawm kwv yees li 10% -15%, kev ntxuav yuav tsum tau txiav txim siab.
Kev ntxuav lub cev:Qhov no feem ntau suav nroglow-siab, siab-flow flushing. Los ntawm scouring lub membrane nto nrog lub siab - cov dej ntws ceev, cov khoom tsis huv yuav raug tshem tawm tau zoo. Rau qee qhov system configurations,rov qab ntxuavkuj tseem tuaj yeem ua kom tshem tawm cov khoom txuas los ntawm daim nyias nyias.
Tshuaj ntxuav: Qhov no yog thawj txoj hauv kev rau kev rov ua haujlwm ntawm daim nyias nyias. Ua ntej ntxuav, nws yog qhov zoo tshaj los txiav txim siab hom fouling (xws li inorganic ntsev nplai, organic teeb meem, microbial films) los xaiv tus neeg saib xyuas tsim nyog.
Inorganic Scale Cleaning:Acid ntxuavCov kev daws teeb meem feem ntau yog siv los ua kom cov nplais xws li calcium carbonate thiab calcium sulfate.
Organic thiab Biological Fouling Cleaning: Alkaline ntxuavCov kev daws teeb meem feem ntau yog ua haujlwm, tejzaum nws ntxiv nrog cov biocides tshwj xeeb lossis surfactants, kom tshem tawm cov roj, cov organic teeb meem, thiab bio-slime.
Cov txheej txheem ntxuav feem ntau suav nrog cov kauj ruam xws linpaj cov tshuaj ntxuav, qis -txoj kev ncig thiab so, thiab yaug kom huv si.Nws yog ib qho tsim nyog yuav tsum tau ua raws li cov txheej txheem ua haujlwm kom ntseeg tau tias kev ntxuav kom nyab xeeb thiab ua haujlwm zoo yam tsis muaj kev puas tsuaj rau cov txheej txheem membrane.
► IV. Ntev - Kev Kho Lub Sij Hawm: Kev Tswj Xyuas Zoo thiab Ua Haujlwm Zoo
"kev ua hluas" ntawm daim nyias nyias yog nyob ntawm kev saib xyuas txhua hnub:
Ua raws li Kev Saib Xyuas Txhua Hnub: Tsis tu ncua sau cov ntaub ntawv tseem ceeb xws lipermeate ntws, siab, thiabdej zoolos pab txhawb kev tshawb pom ntxov ntawm qhov txawv txav.
Plan rau Kev Kho Kom Zoo Dua:Txawm hais tias qhov system ua haujlwm ib txwm,kev tu ncua sij hawmyuav tsum tau npaj raws li cov dej tsis zoo thiab lub sijhawm ua haujlwm los tiv thaiv qhov sib sib zog nqus- zaum zaum ntawm fouling.
Txhim kho Pretreatment System:Xyuas kom meej tias cov khoom siv pretreatment upstream, xws li lim thiab softeners, ua haujlwm zootxhawm rau txo qhov kev kho mob ntawm qhov rov qab osmosis membrane.
Hauv cov ntsiab lus, qhov zais cia kom khaws RO daim nyias nyias "cov tub ntxhais hluas" yog nyob rau hauv kev tsim kom muaj kev tswj hwm zoo uas suav nrog -kev kho kom zoo, kev ua haujlwm zoo, thiab kev tu vaj tse. Tshwj xeeb tshaj yog thaum kho complexrov qab osmosis mine dej los yog ua haujlwm siab -tus qauvindustrial rov qab osmosis system,txoj kev xav thiab kev tiv thaiv no yog qhov tseem ceeb tshaj li kev tu lub cev tsis tu ncua.Los ntawm kev cuam tshuam kev cuam tshuam thiab kev tswj xyuas kom zoo, nws muaj peev xwm ua tau kom ntev lub neej kev pab cuam ntawm daim nyias nyias, ua kom lub sij hawm ntev - kev ruaj ntseg thiab kev lag luam ntawm kev kho dej.