Membrane sib cais tsis yog tsuas yog ib qho tseem ceeb txuas hauv cov txheej txheem tsim tshuaj, tab sis kuj yog ib qho tseem ceeb ntawm kev sib cais cov ntaub ntawv ua kua. Kev sib cais qhov tseeb thiab kev sib cais ua kom zoo yog lub hauv paus tseem ceeb rau kev soj ntsuam cov txheej txheem sib cais membrane. Ceramic membrane yog ib qho inorganic sib cais membrane nrog kev sib cais ua haujlwm ntawm cov khoom siv ceramic ua qhov nruab nrab. Nws yog qhov tseem ceeb ntawm cov porous ceramic nrog siab qhib porosity thiab muaj ntau yam qauv xws li tubular thiab phaj hom. Ceramic membrane cov ntaub ntawv feem ntau suav nrog alumina, aluminium titanate, cordierite, zirconia, silicon carbide, thiab lwm yam, thiab cov khoom siv hauv khw feem ntau yog ua los ntawm alumina. Txawm li cas los xij, alumina ceramic daim nyias nyias muaj cov thermal poob siab tsis zoo, cordierite ceramic daim nyias nyias tsis muaj corrosion- tiv taus ntawm qhov kub thiab txias, aluminium titanate ceramic membranes muaj lub zog qis thiab yooj yim rau decompose ntawm qhov kub thiab txias, thiab zirconium oxide ceramics muaj qhov tsis ruaj khov thiab tawg. Cov kev tsis zoo no txwv kev nce qib thiab siv cov oxide ceramics nyob rau hauv cov xwm txheej hnyav xws li kub, muaj zog acid, thiab muaj zog alkali.
Silicon carbide Tubular Ultra Filtration Membranes muaj cov flux loj, corrosion kuj, thiab yooj yim rau rov tsim dua. Yog li ntawd, lawv yog lub npe hu ua cov khoom siv sib cais zoo tshaj plaws membrane.
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Hom kev ua qias tuaj thiab cov kev daws teeb meem zoo sib xws
| Hom Fouling | Tej yam tshwm sim | Kev Tiv Thaiv thiab Tswj Kev Ntsuas | Kev tu huv |
|---|---|---|---|
| Inorganic Scaling | Deposition ntawm calcium thiab magnesium ions, hlau thiab manganese oxides, feem ntau tshwm sim nyob rau hauv siab - hardness dej | Ua ntej- kev kho mob softening txheej txheem, tswj pH khiav hauj lwm; optimize tus ntoo khaub lig- ntws nrawm los txhim kho daim nyias nyias nto scouring | Circulate thiab tsau nrog 1% -2% citric acid / oxalic acid tov rau 2-4 teev |
| Organic Fouling | Adsorption ntawm humic acid, protein thiab roj, feem ntau tshwm sim hauv zaub mov thiab luam ntawv & dyeing dej khib nyiab | Ntxiv PAC/PAM rau coagulation ua ntej-kev kho mob; coj rov qab tsis tu ncua kom txo cov pa phem adhesion | Alkaline ntxuav nrog tov tov ntawm 500-1000 mg / L sodium hypochlorite thiab 0.5% sodium hydroxide |
| Biological Fouling | Kev loj hlob ntawm microbial thiab tsim biofilm, feem ntau tshwm sim hauv qab dej kub ntawm 20-35 degree | koob tshuaj bactericides (sodium hypochlorite, chlorine dioxide) tsis tu ncua; tswj qhov muaj zog DO concentration | Soak nrog 2000 mg / L sodium hypochlorite tov rau 4-6 teev, ua ke nrog ultrasonic tu |
Cov lus dab neeg: nquag siv siab - siv tshuaj ntxuav ua rau cov khoom siv membrane aging; Kev daws: Ua ntej tswj kev ua qias tuaj los ntawm kev ua kom zoo rau kev ua haujlwm tsis zoo (xws li nce hla- ntws nrawm thiab ua kom lub voj voog rov qab ua kom luv), thiab siv tshuaj ntxuav tu ua ib txoj hauv kev ntxiv.
Kev teeb tsa thiab pib- teeb meem
Kev xau tom qab kev teeb tsa membrane module: yuav daws teeb meem thiab daws li cas?
Teeb meem: Cov dej xau ntawm lub membrane module kawg cap, flange kev sib txuas, thiab cov membrane tube interfaces, ua rau txo qis permeate dej tsis zoo thiab qhov system siab hloov pauv.
Ua rau: Kev laus los yog khawb ntawm cov ntsaws ruaj ruaj (O-rings, gaskets) thaum lub sij hawm installation; tsis sib npaug nruj torque ntawm lub hau kawg, ua rau muaj kev ntxhov siab tsis sib npaug ntawm qhov sib khi; misalignment ntawm daim nyias nyias thiab lub raj xa ntawv interface, tsim qhov khoob; impurities nyob rau hauv lub sealing nto tom qab flange kev twb kev txuas.
Kev daws: Tshem lub hau kawg, tshuaj xyuas qhov xwm txheej ntawm cov ntsaws ruaj ruaj, hloov cov hnub nyoog lossis cov ntsaws ruaj ruaj tam sim ntawd, siv cov roj silicone rau lubrication ua ntej kev teeb tsa; siv lub torque ciaj ntswj kom sib npaug ntawm qhov kawg ntawm lub hau bolts, kom ntseeg tau tias lub zog zoo ib yam; ntxuav welding slag, khib nyiab, thiab lwm yam impurities ntawm lub sealing nto; nruab cov khoom siv tau yooj yim ntawm kev sib txuas flange; ua qhov kev ntsuas siab tom qab kev teeb tsa (siab 1.2 npaug ntawm qhov ntsuas kev ua haujlwm siab, tuav rau 30 feeb), thiab tsuas yog muab tso rau hauv kev ua haujlwm tom qab lees paub tias tsis muaj qhov to.
Vim li cas qhov system flux ho qis dua tus nqi tsim tom qab pib?
Ua rau Kev Ntsuam Xyuas: Cov kua dej uas muaj nyob hauv cov raj xa dej tsis huv tsis tau muab yaug tawm thaum lub sijhawm teeb tsa, txhaws cov membrane pores; cov dej hauv dej kub tsawg dhau (flux txo los ntawm 3% ~ 5% rau txhua 1℃poob hauv qhov kub); lub inlet dej siab tsis ncav cuag tus nqi ntsuas; cov txheej txheem pretreatment ua tsis tau tejyam, ua rau raug tshem tawm cov khib nyiab los clog lub membrane nto.
Cov kev daws teeb meem: Ua ntej pib ua haujlwm, thim rov qab cov txheej txheem membrane nrog dej huv kom txog thaum cov dej tsim tawm tsis muaj npuas thiab tsw ntxhiab; kho cov dej kub hauv dej mus rau qhov tsim nyog rau cov khoom siv membrane; maj mam ua kom cov dej nkag siab mus rau qhov ntsuas tus nqi (tsis txhob muaj kev kub ntxhov siab tam sim ntawd - siab surges); xyuas qhov ua ntej - lim (50 μm raug pom zoo) thiab hloov cov lim dej tam sim kom cuam tshuam cov khoom tsis huv loj.
Cov teeb meem tu thiab tu
Vim li cas flux tsis rov qab los tom qab ntxuav tshuaj?
Ua rau Kev Ntsuas: Kev xaiv tus neeg saib xyuas tsis tsim nyog (piv txwv li, siv cov kua qaub muaj zog los ntxuav cov organic fouling); tsis txaus tus neeg sawv cev concentration lossis sijhawm tu; sib xyaw fouling (inorganic + organic), rendering ib qho tshuaj ntxuav tsis zoo; membrane cov ntaub ntawv aging thiab pore deformation.
Kev daws: Txiav txim siab hom fouling los ntawm kev ntsuas dej zoo thiab xaiv cov tshuaj ntxuav kom tsim nyog (acid rau inorganic fouling, alkali + oxidant rau organic fouling, bactericide rau lom fouling); nce tus neeg sawv cev concentration mus rau qhov tsim nyog ntau yam (piv txwv li, 0.5% ~ 1% NaOH rau alkali ntxuav, 1% ~ 2% citric acid rau acid tu); ncua sij hawm so rau 4 ~ 8 teev; siv cov txheej txheem ntxuav ua ke ntawm "alkali tu → dej tu → acid tu → dej tu"; Yog tias daim nyias nyias tau ua haujlwm ntau dua 3 xyoos (organic membranes) lossis 5 xyoos (ceramic membranes), nws raug nquahu kom hloov cov membrane module.
Yuav ua li cas tswj cov txheej txheem membrane tom qab ntev -lub sij hawm tsis ua haujlwm?
Lub sijhawm luv luv -Lub sijhawm kaw (hauv 7 hnub): Yaug lub membrane module nrog dej huv, ntws cov kua dej los ntawm cov hlab ntsha membrane, ua kom cov membrane moisturize, kaw qhov nkag thiab qhov hluav taws xob li qub, thiab tiv thaiv tshav ntuj ncaj qha.
Ntev - lub sij hawm kaw (ntau tshaj 7 hnub): Tshaj tawm thiab ntxuav lub membrane module nrog 0.5% ~ 1% sodium hypochlorite tov, ces yaug nrog dej huv kom txog thaum nruab nrab; tom qab ntawd sau cov hlab ntsha nrog 0.5% sodium bisulfite tov (cov tshuaj tiv thaiv), foob thiab khaws cia kom tsis txhob muaj cov kab mob microbial loj hlob thiab cov khoom siv membrane oxidation; hloov cov tshuaj tiv thaiv tsis tu ncua (hli) thiab xyuas cov txheej txheem ntawm daim nyias nyias.
Kev xav tsis zoo: Kev tsis huv ua ntej ntev - lub sij hawm kaw ua rau muaj cov kab mob sib kis nyob rau hauv daim nyias nyias pores, tiv thaiv flux rov qab thaum rov pib dua;
Kev daws: nruj me ntsis ua raws li cov txheej txheem txij nkawm kom tsis txhob "qhuav" lossis "qhuav" cia ntawm daim nyias nyias.
Cim npe nrov: Tuam Tshoj tubular filtration membrane manufacturers, lwm tus neeg, Hoobkas
