Cov tshuaj chloride concentration cuam tshuam li cas rau lub neej kev pab cuam ntawm Qib 2 titanium cua sov raj?

# Dab tsi yog qhov cuam tshuam ntawm chloride concentration ntawm kev pab cuam lub neej ntawm Qib 2 titanium cua sov raj? Chloride ions feem ntau pom muaj nyob rau hauv fermentation kab lis kev cai xov xwm thiab dej rau CIP tu, thiab lawv cov concentration yog ib qho tseem ceeb hauv kev txiav txim siab lub neej kev pab cuam ntawm Qib 2 ntshiab titanium anti-corrosion cua sov raj. Nyob rau hauv sib piv rau 316 stainless hlau, uas muaj kev tsis ua hauj lwm sai ntawm concentrations tshaj 50 ppm chloride, titanium muaj peev xwm tiv taus siab -concentration chloride attrition los ntawm kev tsim ib tug ruaj khov TiO₂ passivation zaj duab xis nyob rau hauv oxygen- nplua nuj ib puag ncig. Txawm li cas los xij, kev ruaj ntseg ntawm cov yeeb yaj kiab tiv thaiv yuav maj mam deteriorate, hauv zos electrochemical corrosion yuav nrawm dua, thiab lub voj voog siv tau ntawm cov khoom siv hauv lub raj yuav raug txo kom txo qis vim yog qhov txuas ntxiv ntawm cov tshuaj chloride. Cov ntaub ntawv kev ua tau zoo yog muab piv los ntawm cov qauv ntsuas cov ntaub ntawv, thiab kev sib raug zoo ntawm ntau yam chloride concentration ntau thiab titanium tube attenuation ceev yog soj ntsuam hauv kab lus no.|Passivation|Chloride Concentration Range Zaj duab xis lub xeev|Txhua Xyoo Phab Ntsa Thickness Attenuation|Kwv yees lub neej|Yuav Tsum Tau Saib Xyuas Qhov Tseem Ceeb|| ----|----|-{{60}--|----|----|| Hauv qab 30 ppm|Ua kom tiav, ntom nws tus kheej kho zaj duab xis|Tsawg dua 0.02 hli|4–5 xyoo|Peb lub hlis twg nto tej zaum scanning, ib txwm CIP aeration lag luam|| 30–80 ppm|Me ntsis xoob zaj duab xis, me me hauv zos discoloration|0.02–0.05 hli|3–3.5 xyoo|Ib nrab xyoo oxygen-nplua nuj dej ncig passivation, kuaj pom fluoride txhua hli|| 80–150 ppm|Pom tseeb zaj duab xis thinning, tawg ntho etching me ntsis|0.05–0.10 hli|2–2.5 xyoo|Ob-hli muaj peev xwm soj ntsuam, luv offline txhim kho lub voj voog passivation|| Tshaj 150 ppm|Nruam zaj duab xis puas, niaj hnub phab ntsa thinning txaus ntshai|Tshaj 0.10 hli|Tsawg dua 2 xyoos|Nruab chloride hauv internet saib, optimize nruab nrab pre-filtration txheej txheem|Thaum cov tshuaj chloride concentration nyob qis dua 30 ppm, cov pa yaj hauv CIP circulating dej tuaj yeem kho cov teeb meem me me ntawm cov titanium raj nto, thiab phab ntsa thickness attenuation yog qeeb heev, sib piv cov kev pab cuam lub neej ntawm 4 mus rau 5 xyoo. Cov chloride ions yuav nkag mus rau hauv cov crevices ntawm TiO₂ zaj duab xis thiab ua rau lub sijhawm corrosion pits thaum cov concentration nce mus txog 30 ppm lossis siab dua. Lub peev xwm kho tus kheej ntawm cov yeeb yaj kiab passivation yuav ploj mus, thiab qhov nrawm nrawm yuav ua ob npaug hauv peb lub hlis yog tias lub tshuab aeration tsis tswj cov pa oxygen siab tshaj 8 mg / L thaum ntxuav. Kev kuaj xyuas lub peev xwm tsis tu ncua yog qhov tseem ceeb rau fermentation cov kab ntau lawm nrog cov tshuaj chloride ntau tshaj 80 ppm. Ntau lub rooj cob qhia tsis quav ntsej txog theem no, uas ua rau tsis muaj kev cuam tshuam cov phab ntsa nyias nyias kom txog thaum cov dej ntws tawm. Qhov no ua rau tag nrho scrapping ntawm batch nruab nrab thiab nyiaj txiag poob ntau. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias chloride corrosion ntawm titanium raj yog qhov hnyav dua li ntawm 316 stainless hlau. Txawm li cas los xij, lub sijhawm ntev ua haujlwm siab ua haujlwm tseem yuav tsum tau xav txog. Txhawm rau tiv thaiv superimposed galvanic corrosion los ntawm kev ua kom cov khoom muaj hnub nyoog, cov neeg ua haujlwm yuav tsum sau cov ntaub ntawv tshuaj xyuas cov tshuaj chloride txhua lub limtiam, kho qhov zaus ntawm cov dej nplua nuj oxygen passivation raws li qhov sib txawv ntawm qhov sib txawv, thiab cais cov pa roj carbon steel nrog cov tes tsho PTFE. Txhawm rau txo cov tshuaj chloride los ntawm cov khoom siv raw, cov lag luam uas muaj cov tshuaj chloride ruaj khov yuav tsum siv cov khoom nruab nrab ua ntej pom. Ua ke nrog cov txheej txheem txij nkawm, kev pab cuam lub neej ntawm Qib 2 titanium cua sov raj tuaj yeem txuas ntxiv, ua rau txo qhov zaus ntawm cov nqi hloov pauv thiab tsis tau npaj kaw los ntawm kev tsis ua haujlwm corrosion. Ua tiav GMP cov ntaub ntawv tshawb xyuas tseem yog tsim los ntawm cov ntaub ntawv tshawb xyuas cov tshuaj chloride tiag tiag thiab cov ntaub ntawv saib xyuas, kom ntseeg tau tias tag nrho traceability ntawm cov cuab yeej tiv thaiv corrosion.