Nyob rau hauv - deposit corrosion perforation tsis ua hauj lwm yog hais txog impurities, sediment thiab scaling tshuaj nyob rau hauv thiab adhering rau lub puab phab ntsa ntawm lub cua sov yeeb nkab los tsim ib tug cover deposit txheej. Cov kua dej hauv qab cov av tsis tuaj yeem pauv nrog cov khoom nruab nrab nruab nrab, tsim kom muaj kev kaw qhov chaw nyob hauv microenvironment. Tus nqi pH hauv zos poob qis thiab corrosive ions mloog zoo tsis tu ncua, rhuav tshem cov yeeb yaj kiab tsis zoo ntawm cov hlau tsis huv thiab ua rau thaj chaw pitting corrosion uas txuas mus rau cov yeeb nkab phab ntsa, ua rau nruab nrab to. Qhov kev ua tsis tiav no tau muab zais rau hauv qhov chaw fouling thiab nyuaj rau kev kuaj pom txhua hnub, tshwm sim dav hauv cov kav dej cua sov uas tsis zoo nruab nrab pom thiab ntev - lub sijhawm qis - khiav haujlwm.
1. Corrosion Occlusion thiab Perforation Mechanism
Tom qab cov khoom impurities tso rau ntawm cov yeeb nkab sab hauv phab ntsa, qhov chaw npog yog cais tawm ntawm cov kua dej loj. Dissolved oxygen nyob rau hauv qhov sib txawv deposit yog sai npaum li cas los ntawm electrochemical corrosion tshwm sim, tig lub npog hlau nto mus rau hauv ib tug anode cheeb tsam yog heev yooj yim mus dissolution. Chloride ions thiab acid radicals nyob rau hauv lub mainstream nruab nrab tsis tu ncua tsiv mus nyob rau hauv lub sediment kom sib npaug nqi zoo, ua rau lub confined cheeb tsam heev acidic thiab corrosive. Lub passive chromium oxide zaj duab xis ntawm 316 stainless hlau raug rhuav tshem hauv zos, thiab cov pits corrosion loj hlob sab hauv. Cov sediment txheej tiv thaiv sab nraud siab thiab ntws scouring, tso cai rau cov pits kom nthuav dav mus txog thaum phab ntsa nkag. Qhov sib txawv ntawm cov khoom siv sab hauv ntawm tag nrho cov raj xa dej, qhov kev xeb no tsuas yog siv hauv qab cov av deposits, thaum cov yeeb nkab raug phab ntsa tseem zoo li qub.
2. Cov hauj lwm zoo tshaj plaws nyob rau hauv -Txoj Cai Txhaum Cai
Hauv qab ntawm cov kav dej kab rov tav qhov twg hnyav impurities ib txwm nyob thiab pawg;
Tsawg-tuag tuag ceg kav dej tsis muaj kev ncig nruab nrab thiab ntev -lub sij hawm ua kua stagnation;
Sab hauv phab ntsa ntawm cua sov coil kav dej uas tsis tshua muaj kev tshaj tawm thiab tsis muaj zog tus kheej -flushing peev xwm;
Txo - txoj kab uas hla cov kav dej uas ntws qeeb thiab cov khoom me me yog yooj yim khaws cia;
Cov raj xa dej hauv qab ntawm cov ntxaij lim dej thaiv nrog ntau tus neeg tsis tau lim dej nkag mus rau hauv lub cev.
3. Core Inducing Factors Accelerating Corrosion Damage
Tsis muaj cov cuab yeej lim dej ntawm cov raj xa dej, nrog cov nruab nrab nyoos nqa cov khib nyiab loj;
Ntev -lub sij hawm qis- ntws los yog cuam tshuam kev kaw haujlwm ua rau impurity nag lossis daus thiab deposition;
Tsis muaj tshuaj ntxuav tu lossis ntxuav hauv online kom tshem tawm cov khib nyiab hauv cov yeeb nkab;
Qhov nruab nrab uas muaj chloride ions thiab acidic Cheebtsam uas aggravate occluded cheeb tsam corrosion;
Cov kav dej ntev ntev stagnation lub sijhawm thaum lub kaw lus kaw yam tsis muaj kev kho dej.
4. Tag nrho -Txuas Kev Tiv Thaiv thiab Tswj Kev Ntsuas Kev Ntsuas
① Nruab ntau- theem precision lim thiab av cais ntawm qhov system inlet
Intercept particle impurities los ntawm qhov chaw kom tsis txhob muaj sediment tiam.
② Teeb qhov tsawg kawg nkaus ntws interlock program txwv tsis pub ntev - lub sij hawm qis - khiav stagnant
Siv cov kua nplaum nplaum los tiv thaiv cov av los ntawm adhering rau cov yeeb nkab phab ntsa.
③ Tsim kom muaj cov dej ntws tawm mus ib ntus thiab siab - cov phiaj xwm dej ntws ceev ceev
Ua tib zoo striped fouling ua ntej tuab cov ntaub ntawv occluded corrosion zones.
④ Ntxiv cov tshuaj tiv thaiv corrosion thiab dispersants rau qhov nruab nrab circulating
Disperse me me hais thiab suppress electrochemical pitting cov tshuaj tiv thaiv.
⑤ Npaj cov tshuaj endoscopic tsis tu ncua thiab phab ntsa tuab scanning ntawm kab rov tav cov yeeb nkab hauv qab
Nrhiav cov pits zais hauv qab cov deposits ua ntej ntawm cov dej xau.
5. Kev Tiv Thaiv Cov Teeb Meem Sib piv
表格
| Kev Ua Haujlwm & Kev Tiv Thaiv Hom | Hauv qab -Txoj Kev Txhaum Cai Txhaum Cai | Daim ntawv thov tswv yim |
|---|---|---|
| Tsis muaj pem hauv ntej- kawg pom + tsis muaj kev tu ncua sij hawm + nquag kaw cia | Nkaum perforation leakage tshwm nyob rau hauv sediment nyob rau hauv lub voj voog ua haujlwm | Ntxiv cov chaw lim dej thiab ua tiav cov kav dej tshuaj tua kab |
| Inlet impurity cuam tshuam + kev tiv thaiv ntws + ruaj - voj voog kav dej ntws tawm | Zoo tshem tawm sediment deposition thiab occluded corrosion tej yam kev mob | Txuj kev ua haujlwm tshwj xeeb rau kaw - voj voog stainless hlau cua sov kav dej |
| Online fouling xyuas + tsis siv neeg lub sij hawm tu + tsau - taw tes tuab nrhiav kom pom | Tsis tshua muaj zais perforation to to | Txoj kev nyiam tshaj plaws rau cov khoom siv hluav taws xob txuas ntxiv mus rau cov khoom siv hluav taws xob |
Xaus
Nyob rau hauv - deposit corrosion ntawm 316 stainless hlau cua sov tubes yog tshwm sim los ntawm sediment ua ib tug kaw microenvironment uas enriches corrosive ions thiab siv oxygen, ua rau lub zos pitting nkag mus rau hauv cov av txheej. Cov tswv yim tiv thaiv tseem ceeb yog thaiv cov impurity inflow los ntawm cov khoom siv lim dej, tsis txhob khiav stagnation kom txo tau qhov kev tso nyiaj, tsis tu ncua tshem tawm cov fouling deposits, ntxiv cov tshuaj additives los inhibit corrosion thiab nqa tawm lub hom phiaj zais teeb meem nrhiav pom. Tag nrho- kev tswj hwm txheej txheem ntawm nruab nrab pretreatment, kev txwv tsis pub khiav lag luam thiab kev saib xyuas cov cuab yeej tuaj yeem tshem tawm qhov kev cia siab kaw thiab qhov nruab nrab ntawm cov dej xau los ntawm hauv qab - deposit corrosion ntawm cov kav dej cua sov.
