Dab tsi yog Qhov Zoo Ntawm Gr2 Seamless Titanium Tubes hauv Kev Siv Hluav Taws Xob?

Los ntawm ib tug loj tus naj npawb ntawm kev sim thiab daim ntawv thov piv txwv, nws tau raug pov thawj tias daim ntawv thov ntawm titanium raj nyob rau hauv lub hwj chim chaw nres tsheb condenser muaj zoo superiority ob technically thiab economically. Los ntawm qhov kev xav ntawm kev lag luam, xyoo 1983, Nyiv tus 1000mw condenser nuclear fais fab nroj tsuag piping (kwv yees li 50,000 condenser raj) nqi, piv txwv li, raws li lub condenser siv 40 xyoo, qhov nruab nrab txhua xyoo to ntawm txhuas daj cev yog 40 xyoo. Peb qhov teeb meem uas yuav tsum tau daws los ntawm kev siv cov titanium raj hauv cov chaw nres tsheb fais fab.
1. Cov teeb meem corrosion

Seawater yog siv los ua dej txias rau cov condensers hauv cov chaw nres tsheb hauv ntug dej hiav txwv. Raws li dej hiav txwv muaj ntau cov sediment, tshem tawm cov khib nyiab, cov kab mob hauv hiav txwv thiab ntau yam corrosive, qhov xwm txheej hnyav dua nyob rau hauv cov dej brackish alternating ntawm seawater thiab dej dej. Kev lig kev cai tooj liab platform hlau tube corrosion txoj kev yog: zuag qhia tag nrho corrosion (uniform corrosion), yaig, kev nyuaj siab corrosion thiab hais txog. Titanium muaj corrosion kuj zoo heev, titanium raj condenser vim corrosion los tshem tawm seawater leakage xwm txheej, tab sis zoo corrosion kuj, tsis zoo li tooj liab alloy raj raws li qhov chaw ntawm zus tau tej cov tshuaj lom, titanium raj yog ib qho yooj yim mus ua raws li lub puab phab ntsa ntawm lub hiav txwv. kab mob, cuam tshuam rau cov nyhuv ntawm cov cua sov hloov mus rau qhov xav tau ntawm cov khoom siv tu kom zoo.

2. Hydrogen nqus

Txawm hais tias qhov saum npoo ntawm titanium muaj ntom passivation zaj duab xis, hauv ntau cov xov xwm muaj zog muaj zog yog kev tiv taus heev corrosive-resistant, tab sis hydrogen muaj ib qho siab. Yooj yim heev rau nqus hydrogen. tshwm sim ntawm chav tsev kub, kub siab (xws li 100 degree) hydrogen nqus sai. Cov khoom fusion txwv ntawm hydrogen hauv titanium tsawg heev (li 20 ppm), thiab tshaj qhov txwv, hydride (TtH2) precipitates rau saum npoo ntawm titanium. Nrog rau qhov nce ntawm TiH2 cov ntsiab lus ntawm qhov chaw, qhov cuam tshuam tus nqi thiab elongation ntawm titanium ntawm 4j poob sai. Tsis tas li ntawd, thaum cov chav qub qub yog retrofitted, cathodic tiv thaiv cov cuab yeej yuav tsum tau tiv thaiv galvanic corrosion vim tooj liab alloys yog siv rau cov ntawv raj thiab titanium yog siv rau lub condenser raj. Piv txwv li, lub condenser ntawm Hitachi fais fab nroj tsuag yog dej hiav txwv txias, thiab cov titanium raj thiab tooj liab alloy daim hlau ua ib tug thermocouple. Thaum qhov kev tiv thaiv muaj peev xwm qis dua 0.75V (SCE), qhov tawm ntawm titanium raj kawg absorbs hydrogen, hydrogen ntsiab lus ntawm 650ppm tom qab ib xyoos ntawm kev siv; yog tias lub peev xwm yog 0.5 ~ 0.75V (SCE), titanium ntawm chav tsev kub yuav tsis nqus hydrogen.

3.Vibration teeb meem

Vim qhov zoo corrosion kuj ntawm titanium raj. Titanium coagulators tsis xau vim corrosion. Txawm li cas los xij, muaj qhov ua tau tias titanium raj yuav puas vim kev co. Txhawm rau kom tsis txhob muaj teeb meem ntawm kev vibration ntawm titanium raj, hauv kev tsim cov shielded titanium coagulators, nws yog ib qho tsim nyog los txiav txim siab qhov sib txawv ntawm qhov sib txawv ntawm cov qub tsev kho kom zoo nkauj, nws yog ib qho tsim nyog yuav tsum xyuas seb qhov sib txawv ntawm qhov sib txawv ntawm qhov qub.