Kev tshawb nrhiav ntawm daim ntawv thov ntawm titanium thiab titanium alloy cov ntaub ntawv hauv lub tshuab nqus tsev ntsev ua kev lag luam

Tuam Tshoj txoj kev lag luam ntsev yog dominated los ntawm hiav txwv ntsev, ua raws li kuv cov ntsev thiab pas dej ntsev. Txij li xyoo 1950, lub tshuab nqus tsev ntsev ua cov nroj tsuag tau maj mam tshwm sim. Txawm li cas los xij, txij xyoo 1970s, cov khoom siv ntsev ntau tau ntsib teeb meem loj dua corrosion thiab dripping, tshwj xeeb tshaj yog corrosion ntawm chloride ions. Kev txwv los ntawm kev tsim cov khoom siv hlau hauv Suav teb thaum lub sijhawm ntawd, feem ntau ntawm cov khoom siv tseem ceeb hauv kev lag luam ntsev yog ua los ntawm cov hlau, tab sis lub neej kev pab cuam luv luv, xws li 20 carbon steel yeeb nkab nyob rau hauv lub tshav kub exchanger, lub neej kev pab cuam. tsis pub ntau tshaj ib xyoos, lossis txawm tias ob peb lub hlis tom qab pib qhov tshwm sim perforation. Tom qab ntawd sim siv tooj liab, siv sijhawm ntev dua, tab sis li ntawm ob mus rau peb xyoos tom qab ntawd tseem yuav tsum tau hloov pauv, cov khoom siv puas tsuaj loj heev, cov nqi hloov pauv yog siab, thiab cuam tshuam rau kev tsim khoom.
Txhawm rau daws qhov teeb meem no, txij li xyoo 1975, Hunan Xiangli Salt Mine, Hubei Yingcheng Salt Plant, Sichuan Zigong Well Salt Plant thiab thiaj li pib siv ntau cov khoom siv titanium ntau lawm. Yingkou Salt Chemical Plant nyob rau hauv kev taw qhia txog 150, 000 tons ntawm refined ntsev project, nws cov ntsev evaporation khoom kuj xaiv titanium. Los ntawm xyoo 1990, Tuam Tshoj txoj kev lag luam ntsev cov khoom siv hluav taws xob kuj tau pib siv titanium.
Hauv cov txheej txheem ntsev ntau lawm, cov ntsev slurry pipeline corrosion teeb meem yog qhov tshwj xeeb. Kev siv cov pa roj carbon steel yeeb nkab, tsuas yog ib nrab lub hlis ntawm qhov qis ntawm lub raj yuav raug corroded rau hauv lub qhov honeycomb qhov, yuav tsum nquag sau cov xau, txhua xyoo yuav tsum tau hloov cov ntsev slurry pipeline ntau li 6 zaug. Txawm tias muaj cov hlau tsis muaj steel, corrosion perforation tshwm sim tom qab 4 lub hlis. Nyob rau tib lub sij hawm, vim corrosion thiab lwm yam hlau tebchaw nkag mus rau hauv lub brine, qhov zoo ntawm cov ntsev muaj kev cuam tshuam zoo. Tsis tas li ntawd, qhov roughness ntawm phab ntsa tank, xws li cov pa roj carbon steel, ua rau cov teeb meem fouling hnyav dua. Nyob rau tib lub sij hawm, lub fouling yuav thicker thiab thicker, nws thiaj li tsim ib tug loj cheeb tsam ntawm ntsev teev, uas yuav txo tau cov ncig ntim, cuam tshuam lub tshav kub hloov ntawm lub brine, thiab txawm blocks lub inlet ntawm lub cua sov chamber, uas ua rau ib tug shutdown thiab kaw. , nyob rau hauv mob hnyav, hlawv tawm lub tshuab hluav taws xob.

Txhawm rau muab cov txiaj ntsig zoo thiab txhim khu kev qha rau kev xaiv titanium hauv lub tshuab nqus tsev ntsev ntau lawm, Hunan Province, Xiangli Salt Mine, Zigong Well Salt Plant hauv Sichuan Province, thiab lwm yam hauv kev tsim ntsev ntawm titanium on-site dai xeem. Cov ntaub ntawv ntsuam xyuas qhia tau tias titanium nyob rau hauv chloride thiab nqus ntsev chaw tsim khoom nyob rau hauv cov xwm txheej ntawm corrosion kuj tseem ceeb heev. Tom qab siv cov titanium, vim nws cov corrosion kuj, tsis muaj impurities, ua kom tiav cov ntsev zoo yog qhov nyuaj los txhim kho thiab ntau lawm cov khoom poob ntawm cov teeb meem loj. Nws tuaj yeem hais tias daim ntawv thov ntawm cov khoom siv titanium tau coj lub kiv puag ncig tshiab hauv kev xaiv cov khoom siv rau lub tshuab nqus tsev ntsev.
Nyob rau hauv lub tshuab nqus tsev ntsev cov txheej txheem, cov cua sov chamber yog cov khoom siv tseem ceeb tshaj plaws. Nrog rau kev yug me nyuam thiab kev loj hlob ntawm titanium thiab titanium alloy, vim nws cov kev ua tau zoo heev los tiv thaiv chlorine ion, nws tau nce mus rau kev lag luam ntsev los ntawm lub xeev. Kev tsim cov ntsev hauv tsev tau txais txiaj ntsig plaub lub tshuab nqus ntsev cov txheej txheem, titanium feem ntau yog siv hauv cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob. Thaum tshav kub kub exchanger raj feem ntau 9 meters ntev, phab ntsa thickness ntawm 0.8 thiab 1.5 hli. Titanium nto impurities, muaj zog corrosion kuj, yog li nws tsis yooj yim rau corrosion perforation thiab yeeb nkab clogging tshwm sim. Nyob rau hauv tib lub tshav kub hloov kev ua tau zoo, titanium cua sov chamber muaj qhov zoo ntawm lub teeb yuag thiab me me ntim piv nrog steel tube cua sov chamber.
Lub caij no, brine preheater kuj yog cov khoom siv tseem ceeb hauv cov txheej txheem ntsev ntau lawm. Titanium muaj zog corrosion kuj nyob rau hauv NaCl (sodium chloride) tov nyob rau hauv ib puag ncig qis dua 100 degree. Yog li ntawd, kev siv cov titanium hauv kev tsim cov raj ntim thiab lub taub hau ntawm brine preheaters tuaj yeem tiv thaiv corrosion ntawm NaCl tov ntawm cov khoom siv preheater, yog li ua kom cov khoom siv ib txwm siv.