Hauv kev ua haujlwm niaj hnub thiab kev saib xyuas ntawm cov nroj tsuag dej ultrafiltration (UF), ntxiv rau kev rov qab ua haujlwm tsis tu ncua (BW) (saib cov ntawv txuas), CEB yog ib qho tseem ceeb ntawm kev ncua sijhawm ntawm daim nyias nyias fouling thiab txo qhov xav tau rau kev tu tshuaj sib sib zog nqus.
1. CEB yog dab tsi?
CEB stands rau Tshuaj Kho Mob Rov Qab. Tom qab rov qab ua haujlwm tsis tu ncua (BW), cov kua qaub, alkaline, lossis oxidizing cov neeg ua haujlwm tau ntxiv rau cov dej rov qab kom luv luv cov txheej txheem membrane, tshem tawm cov fouling tawv tawv uas BW tshem tsis tau. Tsis zoo li kev sib sib zog nqus hauv -situ chemical tu (CIP) ua 1-2 zaug hauv ib xyoos, CEB yog cov txheej txheem tu txhua hnub.
2. Peb Cov Tshuaj Siv Tshuaj
Cov tshuaj CEB feem ntau muab faib ua peb pawg, uas tuaj yeem muab ntxiv rau tus kheej lossis siv ua ke hauv theem:
1) Oxidant (Sodium hypochlorite): Ua rau biofilm thiab algal biofouling ntawm daim nyias nyias;
2) Alkali (NaOH): Tshem tawm cov pa phem xws li humic acid thiab roj;
3) Acid (Hydrochloric acid / Nitric acid / Citrate): Tshem tawm cov pa phem xws li calcium, magnesium, hlau, thiab txhuas coagulation residues.
Nco tseg: a. Acid ntxuav yog pom zoo tom qab ntxuav alkaline; b. Oxidants thiab acids yuav tsum tsis txhob sib xyaw kom tsis txhob tsim cov roj chlorine lom; c. Rau cov nroj tsuag dej uas ntxiv cov hlau lossis txhuas coagulants rau cov dej nyoos, kua qaub ntxuav CEB yog qhov tseem ceeb.
3. Peb Txoj Kev Siv Tshuaj
1) Online Dosing: Cov tshuaj yog ncaj qha ntxiv rau cov kav dej rov qab;
2) Ua ntej- Npaj Tshuaj Siv Hauv Lub Tank Cia: Cov tshuaj tau npaj ua ntej thiab siv rau kev ntxuav rov qab;
3) Circulating Chemical Solution Immersion: Cov tshuaj circulates ntawm daim nyias nyias sab kom txhim khu kev tshem tawm ntawm fouling.
Lus Cim: Tom qab cov tshuaj so dej tiav lawm, kev ntxuav kom huv yog qhov tseem ceeb, thiab cov dej khib nyiab yuav tsum tau muab khaws cia thiab sib cais.
4. Kev txiav txim siab zaus?
Raws li kev ua haujlwm ib txwm muaj, CEB lub voj voog raug pom zoo txhua 1-7 hnub.
Rau cov dej nyoos nrog siab turbidity, siab organic teeb meem, thiab siab hardness, lub voj voog luv yog pom zoo.
Rau qhov zoo tshaj plaws dej zoo (tsawg SS, qis DOC), CEB tuaj yeem txo qis lossis txawm tias raug ncua.
Siab- hom ultrafiltration yog qhov yooj yim rau kev ntsuas ntau dua li submerged ultrafiltration, yog li yuav tsum tau siv CEB ntau dua.
5. Tus nqi tsim nyog ntawm kev siv CEB zoo
1) Ncua irreversible membrane fouling thiab stabilizes membrane flux.
2) Txo qhov zaus ntawm kev sib sib zog nqus tshuaj ntxuav, txuag ntawm tus nqi ntxuav.
3) Extends membrane lifespan thiab txo cov peev loj uas yuav tsum tau rau kev hloov membrane.
Cov Ntsiab Lus Tseem Ceeb: Ua ntej CEB niaj hnub rau kev tswj hwm kev ua qias tuaj, txo qis CIP qhov tob ntawm qhov chaw, thiab ua kom zoo rau tag nrho lub neej kev ua haujlwm thiab kev saib xyuas cov nqi ntawm cov nroj tsuag dej.
6. CEB Cov Lus Qhia Ua Ntej
Kev pib CEB tuaj yeem txuas nrog ntau qhov ntev xws li lub sijhawm, qhov dej ntws ntws, qhov sib txawv ntawm qhov sib txawv (TMP), thiab daim nyias nyias. Membrane flux yuav tsum tau ua qhov tseem ceeb raws li qhov taw qhia tswj, thiab pib thiab kaw yuav tsum tau ua raws li qhov xav tau kom tsis txhob siv tshuaj thiab pov tseg tsis zoo.
Xaus: CEB yog ib qho cuab yeej muaj zog rau cov nqi qis -tus nqi kho cov tshuab ultrafiltration. Kev faib cov tshuaj kom raug thiab tswj xyuas lub voj voog ua haujlwm tuaj yeem ua tiav qhov yeej - yeej qhov xwm txheej ntawm kev tsim khoom ruaj khov thiab txo nqi.
