Kev Siv Cov Khoom Siv Titanium hauv PTA Ntau Lawm
Thaum nws los txog rau PTA (purified terephthalic acid), ntau tus neeg yuav xav tias tsis paub, tab sis thaum nws los txog rau cov khoom siv niaj hnub xws li polyester fiber thiab yas, txhua tus neeg yuav hnov zoo. Qhov tseeb, PTA yog ib qho tseem ceeb raw khoom rau cov khoom lag luam paub zoo, thiab nws ua lub luag haujlwm tseem ceeb hauv kev lag luam petrochemical.
Hauv kev tsim cov txheej txheem ntawm PTA, titanium plays lub luag haujlwm tseem ceeb nrog nws cov kev tiv thaiv corrosion zoo heev thiab kub siab zog. Cov txheej txheem tsim khoom ntawm PTA yog qhov nyuaj heev thiab yuav tsum tau ua nyob rau hauv qhov kub thiab txias. Cov xwm txheej hnyav li no tau ua rau muaj kev xav tau siab heev ntawm cov khoom siv, thiab titanium yog qhov kev xaiv zoo tshaj plaws kom ua tau raws li cov cai no.
Amoco, yog ib lub tuam txhab loj tshaj plaws PTA hauv ntiaj teb, siv cov khoom siv titanium thiab carbon hlau los tsim cov reactors hauv nws lub Hoobkas hauv Tebchaws Meskas. Cov khoom siv sib xyaw no sib xyaw ua ke ntawm kev tiv thaiv corrosion ntawm titanium thiab lub zog ntawm cov pa roj carbon steel, tso cai rau lub reactor ua haujlwm ruaj khov nyob rau hauv qhov hnyav ntawm 204 degree thiab 2.5MPa. Hauv No. 2 reactor ua los ntawm Amoco Belgium, 2 hli tuab titanium steel phaj yog siv rau ntawm carbon steel substrate. Nws txoj kab uas hla yog 5.7m, qhov siab yog 12m, thiab hnyav li 170 tons. Qhov kev tsim no tsis tsuas yog txhim kho corrosion kuj ntawm reactor, tab sis kuj ua kom nws txoj kev nyab xeeb thiab ruaj khov hauv kev ua haujlwm ntev.
Nyiv kuj tseem muaj zog heev hauv kev tsim PTA. Nws lub thawv siab siab ntawm terephthalic acid reactor txais ntau txheej cylindrical qauv ntawm titanium composite phaj thiab ib-phab ntsa ntim ntawm titanium composite phaj. Cov thawv no tsis tsuas yog muaj kev tiv thaiv corrosion zoo heev, tab sis kuj tuaj yeem tiv taus siab heev thiab kub. Tsis tas li ntawd, cov tuam txhab Nyij Pooj kuj tau xaiv Ti-6AI-4V titanium alloy rau cov khoom sib txuas thiab cov khoom siv foob. Cov hlau no muaj lub zog siab, tsis tshua muaj lub ntiajteb txawj nqus thiab zoo heev corrosion kuj, uas yog heev haum rau cov khoom tseem ceeb hauv PTA ntau lawm.
Nyob rau hauv kuv lub teb chaws, feem ntau ntawm cov khoom siv PTA yog imported los ntawm txawv teb chaws. Piv txwv li, Shanghai Petrochemical tau qhia txog terephthalic acid qis-kub oxidation ntau lawm chav tsev los ntawm Nyiv xyoo 1974, uas koom nrog kev thov ntawm titanium. Nyob rau hauv 1984, Shanghai Petrochemical kuj qhia ib chav tsev polyester los ntawm Nyiv, uas 6 esterification coolers yog ua los ntawm titanium. Los ntawm xyoo 1990, qee cov khoom siv titanium tau qhia hauv cov txheej txheem hydrogenation ntawm Yizheng Chemical Fiber thiab Luoyang Petrochemical. Cov khoom siv qhia no tsis yog tsuas yog txhim kho cov txheej txheem ntawm PTA ntau lawm hauv kuv lub teb chaws, tab sis kuj txhawb kev nthuav dav ntawm titanium hauv PTA ntau lawm.
Nrog rau kev nthuav dav ntxiv ntawm lub ntiaj teb polyester fiber, yas thiab lwm yam kev lag luam, qhov kev thov rau PTA tseem loj hlob tuaj. Yuav kom ua tau raws li qhov kev thov no, cov tuam txhab los ntawm thoob plaws lub ntiaj teb tab tom tshawb nrhiav PTA tshiab cov txheej txheem tsim khoom thiab cov khoom siv. Hauv cov txheej txheem no, titanium yuav txuas ntxiv ua lub luag haujlwm tseem ceeb hauv PTA ntau lawm nrog nws cov txiaj ntsig zoo. Nyob rau tib lub sijhawm, nrog kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis thiab kev txhim kho txuas ntxiv ntawm cov txheej txheem, daim ntawv thov ntawm titanium hauv PTA ntau lawm yuav dhau los ua qhov dav thiab qhov tob.
