Kev puas tsuaj ntawm abrasive inorganic khoom hais nyob rau hauv fermentation nruab nrab mus rau plaub hom cua sov raj

# Kev soj ntsuam ntawm Pipeline Dead Zones Ua tiav Kev Tswj Xyuas Kev Ua Haujlwm Rau Kev Ua Kom Tshav Kub Kub Corrosion Tsawg- cov chaw nyob ruaj khov, xws li cov hlua khi hauv qab, cov kav dej tsis pom kev, cov kab noj hniav valve, flange gasket qhov khoob, lub luj tshib sab hauv cov ces kaum, bracket contact crevices, thiab ceg yeeb nkab kawg caps. Lub sij hawm ntev - khaws cia ntawm nruab nrab sediment, acid/alkali residues, chloride, fluoride, thiab microbial sludge yog vim tsis muaj peev xwm ntawm cov kua scouring mus cuag cov hauj lwm no thaum lub sij hawm CIP thiab fermentation ncig. Thawj qhov chaw ua tsis tiav thaum ntxov ntawm tag nrho plaub cov khoom siv hluav taws xob cua sov yog cov chaw nyob ruaj khov siab -corrosion microenvironments uas cov chaw tuag tsim.|Cua sov Tube Khoom|Corrosion Manifestation nyob rau hauv qhov xwm txheej tuag|Progressive Damage Cycle|Core Targeted Txhim Kho Kev Ntsuas|| ----|----|-{{54}--|----|----|| 316 Stainless Hlau|Concentrated chloride thiab biofilm induce weld pitting thiab annular xeb ntawm flange khoob.|Qib 2 Titanium|Local dissolved oxygen depletion thiab fluoride enrichment form milky annular etching bands ntawm flanges.|Tsau qis- thaj chaw muaj peev xwm corrosion tsis pub dhau 1.5 lub hlis.|Tag nrho loj- radius luj tshib transformation; tsis txhob nqaim gasket stagnant gap.|PFA Coated rhaub|Alkali daig hauv txheej khawb ntawm qhov chaw tuag tsim cov hlwv interlayer zais.|Local txheej bulging thiab tev nyob rau hauv 3 lub hlis.|Txhim kho cov dej ntws tawm rau cov ntsiab lus qis; nce khiav ceev ntawm ceg terminals|| Quartz iav|residual alkali adsorbed los ntawm biofilm tshwm sim nyob rau hauv uneven frosting thiab ib tug txo nyob rau hauv lub teeb transmittance|Kev pheej hmoo siab thermal tawg tom qab 3-4 batch|Tshem tawm kab rov tav qhov muag tsis pom; ua puv siab -flow acid flushing txhua lub lim tiam|## 1. Dual core corrosion mechanisms ntawm pipeline tuag zones ### 1.1 Oxygen concentration sib txawv corrosion cells tsim Cov cheeb tsam tseem ceeb tau txuas ntxiv nrog oxygen{106}} cov kua dej nplua nuj, thaum thaj chaw tsis muaj zog nyob twj ywm rau lub sijhawm ntev. Ib cheeb tsam qis-oxygen anode yog tsim nyob rau hauv cov sediment raws li cov kab mob sai sai nqus cov pa oxygen hauv cov kua uas tsis zoo. Sustained localized corrosion yog pib los ntawm kev sib txuas txuas ntxiv ntawm cov hlau anode kom sib npaug ntawm cov peev txheej electrochemical. ### 1.2 Nruam ntxiv ntawm corrosive tshuaj Acid, alkali, chloride, thiab fluoride yog uniformly diluted los ntawm qhov nruab nrab ntws; Txawm li cas los xij, cov corrosive Cheebtsam no raug kaw rau hauv qhov chaw tuag tsis tu ncua. 1. Tom qab CIP, cov kua dej uas muaj nyob hauv alkaline/acid cleansing ua ke ntawm tus nqi uas yog kaum ob npaug ntawm cov concentration, vim nws tsis tuaj yeem ntws tawm tam sim ntawd . 2. Hauv cov xwm txheej tsis zoo, chloride, fluoride ions, thiab inorganic crystals deposits {35} cov phab ntsa ntawm cov khoom siv hluav taws xob. Mycelium, protein, thiab ntxhia hais nyob rau hauv ib tug tuab biofilm, uas encases tag nrho cov corrosive tshuaj nyob rau hauv lub zaj duab xis txheej. Qhov no ua rau nws tus kheej - ua kom lub voj voog kev txhim kho corrosion uas tsis tuaj yeem zam nrog ib txwm ib txwm -batch CIP. ## 2. Progressive corrosion degradation nyob rau hauv qhov chaw tuag ntawm cov khoom uas yog tshwj xeeb rau nws ### Cov cua sov ua los ntawm 316 stainless hlau Stainless hlau yog heev raug rau chloride enrichment nyob rau hauv tuag aav. Weld crevices thiab flange gaps yog qhov chaw nyob ruaj khov. Qhov kev pab cuam biofilm depletes oxygen, thiab cov tshuaj chloride nkag mus rau cov chromium passive zaj duab xis puas los ua qhov sib sib zog nqus pitting. Cov cheeb tsam tuag hauv zos chloride concentration yuav ntau tshaj 500 ppm, txawm tias qhov tseeb tias tag nrho cov tshuaj chloride ua tau raws li tus qauv 50 ppm. Los ntawm- phab ntsa to ntawm flanges thiab cov hlab ntim hauv qab yuav tshwm sim nyob deb ua ntej ntawm kev tsim kev pab cuam lub neej yog tias qhov chaw tuag tsis raug tshem tawm thaum lub sijhawm ua haujlwm ntev -. ### Titanium Heating Tubes ntawm Qib 2 Cov chaw tuag tag nrho txiav tawm cov pa oxygen, txawm tias qhov tseeb tias titanium tso siab rau cov pa oxygen ntau dua lossis sib npaug li 8 mg / L kom ua tiav TiO₂ zaj duab xis kho tus kheej. Biofilm nyob rau hauv stagnant gaps adsorbs kab fluoride nyob rau hauv lub system, ua rau tsim ntawm annular milky dawb etching bands nyob ib ncig ntawm flanges thiab dig muag yeeb nkab kawg. Localized zaj duab xis dissolution puas tsuaj yog zais los ntawm ib txwm niaj hnub mainstream yaj cov ntaub ntawv soj ntsuam oxygen; tsuas yog peb lub hlis twg tag nrho-tube electrochemical muaj peev xwm scanning tuaj yeem txheeb xyuas qhov ruaj khov uas tsis tshua muaj peev xwm tuag taus cov ntsiab lus. ### Cov cua sov nrog PFA Txheej Sediment yog qhov nyuaj rau txuas mus rau qhov qub, du PFA qhov chaw; Txawm li cas los xij, thaj chaw tuag qis qis ua rau cov khoom tsis muaj zog thiab cov biofilm mus rau hauv cov txheej txheej khawb. Txhua lub voj voog cua sov vaporises cov ntxiab alkali, tsim kom muaj kev nthuav dav uas nthuav dav cov hlwv zais. Residual alkaline ntxuav kua yog kaw hauv khawb interlayers. Cov pob khaus ntawm qhov chaw tuag tsis tuaj yeem kuaj pom thaum lub sij hawm saib xyuas txhua hnub, thiab ib zaug ruptured, carbon steel substrate rust contaminates fermentation broth, yuav tsum tau batch scrapping. ### Quartz Iav Cua Kub Tubes Tuag zones ntxiab residual alkaline kua tom qab ua tiav CIP yaug, txawm tias qhov tseeb tias quartz tiv taus cov kua qaub thiab fluoride. Static biofilm perpetually etches silicon dioxide siv lead ua tes hauj lwm los tsim cov txheej tsis sib xws frosted matte los ntawm kev xauv cov hydroxide ions. Ntxiv sediment thiab alkali residues yog ntes los ntawm frosted uneven nto. Kev tawg sai sai ntawm quartz tubes thaum lub sij hawm pib cua sov yog nkag tau los ntawm cov concentration ntawm sab hauv kev nyuaj siab ntawm frosted tuag cheeb tsam txoj hauj lwm thaum lub sij hawm nquag txias-kub thermal cycling. ## 3. Kev tsim thiab kev ua haujlwm tsis zoo ntawm thaj chaw ### Tsim kev tsis xws luag (thawj qhov ua rau muaj kev tsis txaus ntseeg mus tas li) 1. Cov ceg tuag ntev, tsis siv ceg kawg lub kaus mom yam tsis muaj qhov tso dej tawm, thiab kab rov tav dig muag kav; 2. Tube pob hauv qab kab rov tav ntu yam tsis muaj cov kav dej sib txuas, nrawm 90℃lub luj tshib nrog lub vojvoog me me; 3. Lub flange yog qhov nqaim dhau, ua rau muaj cov roj hmab tuab uas tsim cov stagnant crevices ntawm lub gasket thiab lub raj phab ntsa . 4. Pipeline elevation uas tsis tsim nyog, nrog rau qhov tsis tuaj yeem tso tawm li qub thiab cov ntsiab lus qis qis. ### Cov phom sij tuag ua rau muaj kev phom sij ntau ntxiv los ntawm kev ua haujlwm tsis zoo 1. CIP ntws nrawm qis dua cov khoom siv nyab xeeb, thiab lub zog scouring tsis txaus los tshem tawm cov av xuab zeb tuag . 2. Kev khiav tawm tsis tiav ntawm cov kua qaub / alkali nyob rau hauv qhov chaw ruaj khov, tuav lub sij hawm luv luv; 3. Lub sij hawm ntev static nruab nrab standby, sediment nyob rau hauv qis-flow inactive zones accumulates tsis tu ncua; 4. Tag nrho cov ndlwg yog attenuated raws li qhov tshwm sim ntawm lim blockage, uas ntxiv txo cov kua dej scouring zog ntawm qhov chaw tuag . 4. Ib tug tag nrho-txheej txheej kaw-voj tuag cheeb tsam tshem tawm thiab tiv thaiv corrosion scheme ### Kauj Ruam 1: Siv cov kav dej hloov kho kho kom tshem tawm cov kab mob hauv cheeb tsam 1 qhov muag tsis pom kev. npog; khaws cov ceg luv luv uas tsim nyog nrog qhov ntev ntawm tsawg kawg yog 1.5 npaug ntawm cov yeeb nkab txoj kab uas hla thiab nruab hauv qab ntws li qub. 2. Txhawm rau tshem tawm cov phab ntsa sab hauv qis qis qis qis, hloov txhua lub kaum sab xis ntawm lub luj tshib nrog lub luj tshib nkhaus loj . 3. Nruab ib qho kev ywj pheej pab me me ncig cov kav dej ntawm cov hauv qab ntawm cov kav dej, cov kav dej thiab cov kav dej ua tiav. turnover. 4. Standardize qhov xaiv ntawm gaskets: nyias elastic PTFE gaskets kom txo tau qhov chaw rau sediment entrapment thiab txo flange sealing qhov sib txawv. ### Kauj Ruam 2: Kev ua kom zoo ntawm cov txheej txheem CIP txhawm rau txhim kho thaj chaw tuag ntxuav 1. Khaws cov phab ntsa ntws nrawm hauv cov khoom siv nyab xeeb thiab siv cov khoom siv hluav taws xob siab kom huv rau 5 feeb ntawm qhov xaus ntawm txhua lub voj voog CIP kom cuam tshuam rau thaj tsam tuag taus . 2. Ua kom lub sij hawm tuav rau ntau theem rinsing thiab txiav txim siab pulse raws li qhov kawg. txhawm rau tshem tawm cov kua qaub thiab alkali seem nyob rau hauv qhov tsis sib haum xeeb . 3. Kev sib sau ntawm biofilm thiab inorganic ntsev deposits nyob rau hauv inactive zones raug tshem tawm los ntawm txhua hli txhim kho acid pickling ncig. ### Kauj Ruam 3: Cov txheej txheem ntau lawm kev ua haujlwm tshwj xeeb 1. Tiv thaiv kom tsis txhob muaj cov av khib nyiab los ntawm kev ua kom qis qis qis qis rau cov khoom siv hluav taws xob thiab txwv tsis pub lub sij hawm ntev static nruab nrab khaws cia . 2. Txhawm rau tiv thaiv tag nrho cov dej ntws tawm los ntawm kev lim dej, nws yog ib qho tsim nyog los ntxuav ob-theem pem hauv ntej lim txhua qhov kev hloov pauv . 3., kev tu IP kom tiav; cycles kom tshem tawm cov av khib nyiab thiab cov khib nyiab uas tau sau rau hauv qhov chaw tuag thaum kaw. Kauj Ruam 4: Kev tshuaj xyuas tsis tu ncua ntawm thaj chaw tuag corrosion nrog kev ua kom pom tseeb 1. Stainless hlau thiab titanium cov cuab yeej: tsom rau kev saib xyuas ntawm flange, lub luj tshib, thiab lub raj hauv qab discoloration; Peb lub hlis twg muaj peev xwm thiab ultrasonic phab ntsa thickness kuaj rau qhov chaw nyob ruaj khov; 2. PFA-coated heaters: Lub hli infrared thermal scanning los txheeb xyuas cov cheeb tsam txias uas yog tshwm sim ntawm qhov chaw tuag alkali infiltration . 3. Quartz tubes: Ua ob lub lis piam kuaj lub teeb xa hluav taws xob los txiav txim siab txog qib ntawm thaj chaw tuag frosting thiab npaj cov kua qaub ntxuav thaum pom matte discoloration. ## Cov Lus Qhia Txog Kev Ua Haujlwm Lub superimposed kev puas tsuaj ntawm oxygen concentration cell corrosion thiab lub zos enrichment ntawm corrosive ions rau tag nrho cov cua sov raj cov ntaub ntawv yog tshwm sim los ntawm pipeline tuag aav, uas tsim unavoidable static static microenvironments. Lub hauv paus txiav tawm qhov chaw tuag qhov chaw xeb, tshem tawm cov kev pheej hmoo ntawm kev xau thaum ntxov ntawm cov khoom siv cua sov, thiab txuas ntxiv cov cuab yeej siv tag nrho lub neej tuaj yeem ua tiav los ntawm kev hloov kho kho vajtse kom tshem tawm cov qauv tsis ruaj khov, ua kom zoo siab CIP dej ntws tawm, thiab kev ua haujlwm zoo li qub.