Ndeapi marudzi akajairwa efouling blockages mune reverse osmosis/nanofiltration membranes? Kutonga sei? Nzira yekuigadzirisa sei? (1)

1. Kusvibiswa kwezvinhu.
Hunhu: Inowanzoitika padanho rekutanga rekutumwa uye kushanda, iyo inoratidzwa sekukurumidza kuwedzera munguva yekusiyanisa kudzvinyirira uye yakajairika mvura conductivity (kana isiri yakakomba, inoonekwa nekukurumidza uye inobatwa nenguva).
Chikonzero: Panguva yekugadzirisa, membrane system inlet pombi (inowanzo kuwanikwa mushure mekuchengetedzwa kwesefa) haina kushambidza kana kugeza yakasara welding slag kana yakasara sawdust kana imwe tsvina yakasiiwa nePVC pombi yakapindirwa nechikamu chekutanga che membrane yekutanga, uye pakupedzisira yakaunganidzwa pamagumo e membrane, ichivharira membrane runner.
Kutonga nzira: Kutanga sarudza nguva yekuitika (mazuva mashoma mushure mekutanga) uye kukurumidza kwekumanikidza kusiyana kunowedzera padanho rekutanga (nekukurumidza kwazvo), uye wozovhura membrane yekupedzisira chivharo kuti uone kana pane kusachena zvimedu pane membrane yekupedzisira kumeso.
Countermeasures: Geza pombi zvakakwana pasina kusiya zvinhu.

2. Colloidal fouling
Hunhu: Kana rudzi urwu rwekusvibisa rukaitika, mutsauko wekumanikidza muchikamu chekutanga unowanzo kukwirira, yekutanga neyechipiri membranes painopinza chikamu chechikamu chekutanga chakanyanya kukomba, uye membrane kumashure inenge yakachena. Uye iyo online yekuchenesa mhedzisiro yakashata zvakanyanya, uye inogona chete kubviswa nekucheneswa kunze kwenyika. Mushure mekuchenesa, haigoni kupedza mazuva mashomanana uye inofanira kubviswa uye kushambidzwa. Iyo yekuchengetedza sefa chinhu chinotsiviwa nekukurumidza, uye mumatambudziko akaomarara, inoda kutsiviwa mukati memaawa mashoma. Paunobvisa sefa yekuchengetedza, iwe uchaona kuti pane slime pamadziro ayo.
Zvinokonzera:
(1) Iyo ultrafiltration yakatsemuka, zvichikonzera kuti yakanaka flocculate muviri we sedimentation tangi kumberi kumagumo ichipinda mujecha, uye iyo ultrafiltration yakatanga kukwenenzverwa mukuchengetedza sefa element ndokuzopinda mukati mesefa element kuvhara membrane.
(2) Kuwedzera kuwedzera kwePAC kana sodium metaaluminate kana PAM mune sedimentation tangi kumucheto kwemberi kwe membrane inotungamira kune yakawandisa aruminiyamu uye PAM masara mumhepo inonaya.
(3) Scale inhibitors haienderani kugadzira flocs.

Iko kusapindirana kweiyo yakawedzera scale inhibitor inowanzoitika mukuita pakati pe scale inhibitor uye yakasara aruminiyamu mune reverse osmosis mumvura kuti iite floc blocking membrane.

Kutonga sei:
(1) Nzira yekutonga yekuputsika kwewaya ye ultrafiltration ndeiyi inotevera:
Method 1: Tarisa uye edza kuchena kweSDI filter membrane. Mufananidzo uri pazasi unoratidza kusefa kwekutanga kwe250ml ye ultrafiltration yekugadzira mvura membrane panguva yeSDI bvunzo (ultrafiltration mvura yekugadzira yakasviba zvakanyanya, inotora nguva yakareba kusefa 500ml, uye yobva yamira).
Method 2: Ongorora kana turbidity ye ultrafiltration kugadzirwa kwemvura yakawedzera zvisina kujairika, uye yakajairika turbidity yekugadzirwa kwemvura inenge 0.1NTU.
Method 3: Simbisa waya yakatyoka nebubble yekutarisa nzira.

(2) Nzira yekutonga yakawandisa yePAC kana sodium metaaluminate kana PAM mu membrane yepamberi sedimentation tank ndeiyi inotevera:Kuti PAC kana sodium metaaluminate yakawandisa inonyanya kuona iyo yakawedzera aruminiyamu zvirimo, izvo isu tinowanzo kudzora pa

(3) Nzira yekutonga ye scale inhibitor kusapindirana ndeyotevera: Inonyanya kutongwa nemiedzo, uye nzira yekuedza inoratidzirwa neprojekti yedu chaiyo semuenzaniso. Tora membrane mumvura uye uwedzere chiyero inhibitor inoshandiswa panzvimbo (iyo dosage yakafanana neyepa-saiti) uye PAC (yakashandurwa zvinoenderana nezviri mukati mearuminiyamu ion mune membrane inlet). Ipapo kuita kunonyandura kunocherechedzwa kana paine mvura inonaya yakaumbwa. Panguva imwecheteyo, seti yezviyedzo zvisina chinhu inoitwa, asi pasina PAC, zvimwe zvakafanana.
• Hapana PAC inowedzerwa, chete scale inhibitor inoshandiswa panzvimbo inowedzerwa, hapana mvura inonaya inooneka, uye system yacho yakafanana.
• Kuwedzerwa kwepa-site PAC uye scale inhibitor yakakurumidza kubudisa mvura yairatidzika kuva inopindirana zvakanyanya nemaitiro ekusvibisa pamembrane end face.
•Neimwe scale inhibitor kuyedza (yakawedzerwawo PAC yekushandisa mumunda), hapana marara akaonekwa, uye hurongwa hwaive hwakafanana.
Zviyedzo zviri pamusoro zvinoratidza kuti scale inhibitor inoshandiswa mumunda haienderane nePAC, zvichikonzera kunaya kwemvura, uye imwe scale inhibitor inoda kutsiviwa.

Countermeasures:
(1) Kana iyo ultrafiltration yakaputsika, iyo plug yewaya inofanirwa kugadziriswa zvinoenderana ne membrane manual nzira. Kana ikatyora zvakanyanya, zvinokurudzirwa kuitsiva.
(2) Kana paine yakawandisa dosing yePAC kana sodium metaaluminate kana PAM mune inonaya tangi kumberi kumucheto kwe membrane, dosi yakakodzera inofanirwa kutariswa kuburikidza nekuyedza beaker uye maitiro ekudzora zvinangwa.
(3) Kana iyo inhibitor yakakura ikawanikwa isingaenderani, inofanira kuchinjwa. Paunenge uchishandisa chiyero chitsva inhibitor, zvinodikanwa kuti uone kana ichienderana nemumiririri akawedzerwa pasaiti kuburikidza nekuyedza.