Yuav Ua Li Cas Tsis Zoo CIP Flow Velocity Accelerates Corrosion thiab Failure of Heating Tubes

# Kev nrawm ntawm Corrosion thiab tsis ua haujlwm ntawm cov cua kub cua sov los ntawm qhov tsis zoo CIP Flow Velocity Lub zog ntws yaug yuav tsum tau tshem tawm biofilm, residual alkali, chloride, thiab nruab nrab detritus los ntawm cov phab ntsa ntawm cov cua sov raj yog ncaj qha txiav txim siab los ntawm kev khiav ceev ntawm CIP ncig. Lub neej kev pab cuam ntawm 316 stainless hlau, Qib 2 titanium, PFA- cov cua sov, thiab quartz tubes yuav raug txo kom tsawg vim qhov kev khiav ceev uas tsawg dhau lossis siab dhau. Ntau hom kev puas tsuaj yuav raug ntxias. Cov lus hauv qab no npaj txhua yam khoom siv rau hauv ob qhov kev pheej hmoo, qhov pom kev tshaj tawm tsis zoo, thiab cov phiaj xwm txhim kho.|Cua sov Tube Khoom|Kev phom sij ntawm kev tsis txaus qis qis qis|Kev phom sij ntawm Kev Tshaj Tawm Tshaj Tawm|Safe Phab Ntsa Flow Velocity Range|Txheej txheem optimization ntsuas|| ----|----|----|----|----|| 316 Stainless Hlau|Biofilm accumulates ntawm welds thiab luj tshib; oxygen concentration hlwb tsim kom induce pitting; chloride erodes passive zaj duab xis|Siab-cov khoom ceev ceev abrade cov chromium oxide zaj duab xis, uas ua rau tsim cov grooves ntawm qhov tsis sib xws weld nto|1.2–1.8 m/s|Kev tswj lub twj tso kua mis ntau zaus; huv si ntau-theem filters ib ua haujlwm|| Qib 2 Titanium|Cov pa oxygen hauv zos yog siv los ntawm biofilm blocks TiO₂ zaj duab xis tus kheej- kho; fluoride concentrates nyob rau hauv biofilm los ua ib yam etching|Kev sib sib zog nqus khawb tsis tuaj yeem kho, cov ntsiab lus tsis muaj zog corrosion mus tas li yog tsim|1.0–1.6 m/s|Txwv qhov siab tshaj plaws twj tso kua mis zaus; ntxiv auxiliary aeration flushing rau qhov chaw tuag|| PFA Coated rhaub|Alkali kua daig nyob rau hauv txheej scratches accumulates rau daim ntawv zais interlayer hlwv|Siab-kev cuam tshuam nrawm nrawm txiav cov khawb tshiab, nthuav dav cov kab nkag rau cov kua dej corrosive|1.0–1.5 m/s|Nruab dual-theem zoo lim; ntxiv buffer baffles ntawm lub luj tshib|| Quartz iav|Residual alkali xauv los ntawm biofilm aggravates irreversible frosting ntawm quartz nto|||Pom tsis pom microcracks ntawm lub raj phab ntsa yog tsim los ntawm cov dej txuas ntxiv cuam tshuam kev ntxhov siab|0.8–1.2 m/s|Txoj cai sab xis-lub luj tshib yuav tsum tau hloov nrog loj-lub luj tshib nkhaus|## 1. Mechanism ntawm kev puas tsuaj tshwm sim los ntawm qhov qis tshaj CIP ntws tshaj tawm Raws li qhov tshwm sim ntawm cov kua dej scouring quab yuam tsis txaus los tshem tawm cov viscous microbial biofilm thiab cov khoom seem corrosive, pheej nyob hauv cheeb tsam siab -corrosion microenvironments yog tsim thaum lub phab ntsa ntws tawm tshaj tawm 3 qhov kev nyab xeeb ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm O cell yog tsim los ntawm biofilm deposition. Chloride thiab alkaline ntxuav cov kua yog nyob hauv qab zaj duab xis thiab tsis tuaj yeem diluted los ntawm cov dej ntws loj, thaum cov kab mob anaerobic nyob rau hauv zaj duab xis tsim cov organic acids . 2. Nyob rau hauv rooj plaub ntawm 316 stainless hlau, cov chromium- nplua nuj zaj duab xis yog yaj los ntawm cov kua qaub hauv zos. Cov tshuaj chloride sib sau ua ke sai sai nkag mus rau hauv cov hlau liab qab thiab tsim qhov sib sib zog nqus ntawm cov welds. 3. Titanium cua sov raj: Tus kheej- kho cov tshuaj tiv thaiv ntawm TiO₂ tiv thaiv zaj duab xis cuam tshuam los ntawm biofilm, uas siv cov pa oxygen nyob ze ntawm lub raj phab ntsa. Qhov nruab nrab yog enriched nrog cov kab mob fluoride hauv qab zaj duab xis, ua rau cov mis nyuj sib xyaw ua ke . 4. Nyob rau hauv rooj plaub ntawm PFA-coated heaters, alkali detergent tsis tuaj yeem tshem tawm tag nrho ntawm micro khawb ntawm txheej. Yog li ntawd, cov kua nplaum uas muaj vaporises thaum lub sij hawm cua sov mus, ua rau cov hlwv sab hauv thiab nthuav dav siab . 5. Rau quartz raj: Si-O siv lead ua network txuas ntxiv etched los ntawm residual alkali confined los ntawm biofilm, uas ua rau tsim ib tug ntxhib frosted txheej uas adheres rau ntxiv biofilm. Cov txheej txheem no perpetuates lub voj voog vicious ntawm corrosion. Lub zog txuag lub twj tso kua mis zaus txo, lub sij hawm ntev tsis huv thaiv cov ntxaij lim dej, cov kav dej me me uas tsis tsim nyog, thiab cov kav dej tuag tsis muaj kev sib koom ua ke yog qhov ua rau qis qis tshaj tawm. Ua ntej pom qhov tsis muaj xim los yog cov dej xau tshwm sim, zais hauv zos corrosion yuav nyob ntev li ob peb lub hlis. ## 2. Mechanism ntawm kev puas tsuaj tshwm sim los ntawm qhov siab tshaj CIP ntws nrawm Thaum lub siab tshaj plaws kev nyab xeeb txwv, cov kua dej ceev ceev, uas yog tov nrog mycelium, inorganic precipitates, thiab cov khoom seem, ua rau irreversible mechanical kev puas tsuaj rau cov qauv kev tiv thaiv los ntawm kev ua kom muaj zog mechanical yaig thiab cuam tshuam rau abrasion5{14 stainless steel phab ntsa (3) 2 titanium): Lub micron-thin passive zaj duab xis nthuav tawm tsis txaus hnav tsis kam. Cov txheej tiv thaiv yog tev tawm los ntawm lub sij hawm ntev particle scouring, nthuav tawm cov hlau raug rau qhov nruab nrab conductive. Qhov kev puas tsuaj loj tshaj plaws yog ntsib los ntawm cov welds nrog cov nplais ntxhib, uas ua rau tsim cov hlua ntev ntev . - PFA-lined heaters: Cov nplaim fluoroplastic mos yog ntaus los ntawm cov khoom tawv tawv ntawm kev kub ceev, uas ua rau muaj kev sib sib zog nqus khawb thiab nthuav dav ntawm kev puas tsuaj uas twb muaj lawm. Cov txheej txheem no tseem tsim cov conduits ntxiv rau alkali infiltration thiab ua kom lub delamination ntawm txheej txheej . - Quartz iav: Sab hauv phab ntsa ntawm lub raj ua rau muaj kev sib hloov tensile thiab compressive nro raws li qhov tshwm sim ntawm kev rov ua dej nrawm, ua rau tsim cov microcracks pom. Kev tawg sai sai thiab thaum kawg ua rau lub raj tawg tam sim ntawd thaum raug rau qhov txias txias-kub hloov pauv thermal stress. ## 3. Tswj cov txheej txheem rau CIP ntws tshaj tawm uas yog tus qauv ntawm qhov chaw ### (1) Tsim kom muaj kev sib cuam tshuam cov kev txwv uas yog cov khoom sib txuam Nruab ntws cov lus tawm tswv yim ntawm lub sijhawm sib cuam tshuam thiab kev tswj ntau zaus ntawm cov twj tso kua mis. Lub twj tso kua mis ua haujlwm zaus raug kaw raws li cov khoom siv ntawm lub raj cua sov kom tiv thaiv cov neeg ua haujlwm los ntawm arbitrarily nce los yog txo qhov ntws nyob rau hauv thiaj li yuav txo tau lub sij hawm ntxuav los yog txuag lub zog. ### (2) Tshem tawm cov kav dej uas muaj qhov txwv tsis pub muaj qhov tuag taus hloov pauv lub luj tshib 90℃rau hauv lub luj tshib nkhaus loj thiab sib txuas cov ceg ntoo me me rau cov hlua khi hauv qab, cov kab noj hniav, thiab cov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob ### (3) Txo cov khoom abrasive particle load ntawm qhov chaw Ntxuav cov ntxaij lim dej txhua qhov kev hloov pauv thiab hloov cov lim lim kom raug raws sij hawm kom txo tau cov khoom tawg hauv qhov siab tshaj tawm. Siv ob-theem pem hauv ntej cov ntxaij lim dej ntawm qhov nkag ntawm lub voj voog cua sov. ### (4) Kev ntsuas qhov sib npaug thiab kev tshuaj xyuas Kos rau qhov ntsuas cov kav dej, lub twj tso kua mis impeller hnav, thiab ib nrab-qhib li qub thaum lub sij hawm hloov kho peb lub hlis twg kom tshem tawm qhov sib txawv ntawm lub sijhawm ntev; calibrate online flowmeters txhua hli. 4. Cov qauv kev tswj tsis zoo uas tau muab qhab nia 1. Yog tias qhov ntws nrawm qis qis qis, yuav tsum tau ua raws li hauv qab no: ua kom lub twj tso kua mis zaus mus rau tus qauv ntau, ntxiv cov dej ntws siab ntws tom qab txhua lub pob kom tshem tawm cov khoom siv biofilm, thiab ua kom zoo dua cov kav dej 9 lub sij hawm dhau los ntawm oculity . tom ntej no Tshaj li qhov txwv tsis tu ncua, tam sim ntawd txo lub twj tso kua mis zaus, tshuaj xyuas lub lim rau kev puas tsuaj thiab nruab nrab cov ntsiab lus, thiab txhim kho qhov cuam tshuam tsis zoo ntawm lub luj tshib kom txo tau cov kua dej yaig . 3. Kev tsis txaus siab tsis ruaj khov: Txhawm rau tiv thaiv kev sib koom ua ke ntawm kev sib hloov siab thiab qis qis ntws cov twj tso kua mis, cov twj tso kua mis tsis ua haujlwm, kev txawv txav. ## Xaus Kev pabcuam lub neej ntawm cov raj cua sov yog cuam tshuam los ntawm kev khiav nrawm ntawm CIP. Tsis txaus txaus ua rau cov deposition ntawm biofilm thiab tshuaj lom neeg nyob rau hauv corrosion, thaum lub sij hawm ntau txaus ua rau mechanical abrasion thiab structural qaug zog. Tus nqi qis, cov txheej txheem hloov kho tau zoo uas tuaj yeem ua kom zoo ntawm CIP tu thiab ncua txhua hom kev xeb tsis ua haujlwm ntawm cov cua sov lub raj yog kev saib xyuas ntawm phab ntsa ntws nrawm hauv cov khoom siv tshwj xeeb kev nyab xeeb.