# Fermentation Heating Tube Anti-Corrosion Long-Term Service Life Assessment & Scrapping Judgment Specification ## Preface Qhov kev qhia tshwj xeeb no tsim cov ntaub ntawv txhawb nqa zaum kawg ntawm kev ua tiav kev tiv thaiv -corrosion document system xws li Doc.33 txog Doc.109. Nws koom ua ke cov qauv tshuaj ntsuam xyuas ib ntus, ntau- qhov ntsuas qhov ntsuas kev ua haujlwm ntawm lub neej, qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas, hloov pauv kev pom zoo ua haujlwm thiab tom qab-scrapping recycling txoj cai pov tseg rau plaub hom cua sov raj. Nws tshem tawm kev siv cov khoom siv corroded loj heev thiab tsis txhob muaj kev nyab xeeb thiab kev puas tsuaj los ntawm kev ua haujlwm dhau sijhawm ntawm cov raj cua sov, ua rau tag nrho - lub voj voog kaw lub voj uas npog qhov kev lees txais tuaj, kev saib xyuas kev ua haujlwm, kev sim tsis tu ncua thiab zaum kawg scrapping. Lub voj voog kev ntsuam xyuas yog txhais raws li cov khoom siv yam ntxwv. Stainless hlau cua sov tubes yuav tsum ua txhua yam kev ntsuam xyuas corrosion txhua 12 lub hlis; titanium cua sov raj thiab PFA coated cua sov raj tau txais kev tshuaj xyuas tag nrho txhua 18 lub hlis; quartz cua sov raj, nquag ua rau tawg tawg puas tsuaj, yuav tsum tau kuaj xyuas peb lub hlis twg thiab ib nrab - xyoo phab ntsa thickness nrhiav tau. Txhua yam kev ntsuas ntsuas tau muab tso rau hauv cov phiaj xwm ua haujlwm tu txhua hli, thiab cov ntaub ntawv ntsuas ntsuas tau muab xa mus rau cov khoom siv puv - cov ntaub ntawv keeb kwm ntawm lub neej. Tsib qhov tseem ceeb qhov ntsuas qhov ntsuas tau raug coj los siv rau kev ntsuas kev pabcuam lub neej. Ua ntej, residual phab ntsa thickness: sib piv cov nqi ntsuas nrog cov thawj Hoobkas qauv thickness, thiab kos cov hlab nrog phab ntsa thickness poob tshaj qhov chaw nyab xeeb raws li siab - cov khoom txaus ntshai. Qhov thib ob, nto corrosion degree: cov ntaub ntawv pitting ceev, etching qhov tob thiab vuam seam corrosion ntau yam ntawm kev soj ntsuam pom thiab microscopic scanning. Thib peb, sealing txuam kev ua tau zoo: xyuas flange tiv tauj nto corrosion thiab aging ntawm matched gaskets los txiav txim qhov kev pheej hmoo ntawm to. Thib plaub, kev pheej hmoo ntawm kev sib kis hauv nruab nrab: txheeb xyuas qhov seem ion nag lossis daus thiab biofilm adhesion tom qab pickling thiab passivation. Thib tsib, keeb kwm txawv txav ntau zaus: suav cov dej xau, tshaj - txwv tsis pub muaj kev cuam tshuam corrosion thiab cov ntaub ntawv ceev xwm txheej ceev ntawm lub raj cua sov thaum ua haujlwm. Cov qauv kev txiav txim siab hierarchical faib cov cua sov rau hauv peb qib ua haujlwm. Qib A (kev pabcuam ib txwm muaj): txhua qhov ntsuas tau ua raws li cov qauv kev nyab xeeb, tso cai ua haujlwm txuas ntxiv mus txog rau lub voj voog kev ntsuas tom ntej. Qib B (kev soj ntsuam tsis pub dhau): cov ntsuas ib feem me ntsis dhau qhov ntau yam tsis muaj kev pheej hmoo nkag mus; kev soj ntsuam zaus yog ob npaug, thiab lub hom phiaj txhim kho pickling kev kho mob yog siv, nrog rau kev ntsuam xyuas rov qab teem sijhawm li peb lub hlis. Qib C (yuav tsum tau scrapping): cov phab ntsa tuab tuab heev, nkag mus rau pitting, txheej tev, zais cov kab nrib pleb lossis rov ua txhaum; cov raj cua sov no yuav tsum tau muab cais tawm thiab kaw tam sim ntawd, thiab daim ntawv thov hloov pauv yuav tsum xa hauv ib hnub ua haujlwm. Ib txheej txheem ntau- theem kev pom zoo yog siv rau kev hloov pauv. Cov kws kho mob xa cov ntaub ntawv ntsuam xyuas kev ntsuam xyuas thiab muab cov ntaub ntawv pov tseg, cov neeg saib xyuas cov khoom siv hauv chav ua haujlwm tshawb xyuas ntawm -qhov chaw, cov khoom siv hauv lub Hoobkas tshuaj xyuas thiab pom zoo cov phiaj xwm hloov pauv, thiab lub tsev khaws khoom ua tiav cov txheej txheem tshiab tawm sab nraud tom qab pom zoo. Disassembled scrapped cua sov raj yog cais rau kev pov tseg hauv nruab nrab: cov raj hlau raug xa mus rau kev tshaj lij hlau rov ua dua tshiab, cov khoom puas quartz thiab cov PFA ua tsis tau zoo raug kho raws li kev lag luam pov tseg raws li kev tiv thaiv ib puag ncig, thiab tag nrho cov duab pov tseg thiab cov ntaub ntawv khaws tseg. Tag nrho cov ntawv tshaj tawm kev ntsuam xyuas ib ntus, daim ntawv ntsuam xyuas muab qhab nia, rho tawm cov ntaub ntawv pom zoo thiab xa tawm- cov ntaub ntawv pov tseg rov ua dua tau muab khaws cia hauv ob lub tshuab hluav taws xob thiab ntawv khaws cia rau tag nrho cov kev pabcuam ntawm cov khoom siv. Ntev-cov ntaub ntawv txheeb cais ntawm cov cua sov tube kev pab cuam lub neej yog siv los ua lub hauv paus tseem ceeb rau kev hloov pauv khoom seem, kho vajtse hloov kho kom zoo thiab kev tshuaj xyuas peb lub hlis twg. Qhov kev qhia tshwj xeeb no ua rau qhov kawg - ntawm - kev tswj lub neej ntawm cov khoom siv cua sov, ua kom tiav tag nrho - voj voog tiv thaiv - kev tiv thaiv corrosion los ntawm commissioning rau scrapping, thiab txhim kho kev ncaj ncees ntawm lub Hoobkas tag nrho - teeb tsa kev tiv thaiv -corrosion tswj system.
