Kev siv cov khoom siv titanium hauv kev lag luam ion exchange membrane caustic soda
1. Kev siv cov khoom siv titanium
Nyob rau hauv ion-exchange membrane caustic soda ntau lawm chav tsev, titanium yog tsuas yog siv nyob rau hauv brine theem nrab refining, electrolytic dechlorination, residual chlorine kev kho mob thiab lwm yam khoom siv thiab pipelines.
2. Kev ceev faj rau kev siv cov khoom siv titanium hauv kev lag luam chlor alkali
(1). Titanium tsis tuaj yeem siv rau cov tshuaj chlorine qhuav. Titanium yog nyob rau hauv chlorine. Txawm hais tias qhov kub thiab txias qis dua 0 degree, cov tshuaj tiv thaiv hnyav yuav tshwm sim los tsim titanium tetrachloride, uas yuav decomposed rau hauv titanium dichloride, thiab txawm corrosion thiab combustion. Txhawm rau kom muaj kev ruaj ntseg ruaj khov ntawm titanium hauv cov tshuaj chlorine, cov dej hauv cov tshuaj chlorine yuav tsum tsis pub tsawg dua 0 feem pua thiab 5 feem pua.
(2). Feem ntau, titanium yuav tsis muaj pitting corrosion, intergranular corrosion thiab kev nyuaj siab corrosion, tab sis titanium yog feem ntau ua rau crevice corrosion, tshwj xeeb tshaj yog nyob rau hauv crevices nrog ib tug dav ntawm txog 0 thiab 5 hli. Crevice corrosion feem ntau tshwm sim ntawm kev sib koom ua ke ntawm cov cua kub exchanger tube thiab tubesheet, thiab ntawm kev sib cuag ntawm titanium thiab non-metallic gasket. Tsis tas li ntawd, crevice corrosion kuj yog ib qho yooj yim tshwm sim nyob rau hauv saturated brine saum toj no 120 degree .Cov kev ntsuas hauv qab no tuaj yeem coj los tiv thaiv crevice corrosion:
① Tsis txhob muaj qhov khoob thiab qhov chaw khaws cia ntawm cov khoom siv;
② Siv titanium palladium alloy flange vuam nplhaib, lossis siv titanium gasket thiab titanium clad gasket;
③ Titanium tube thiab tubesheet yog siv rau kev sib pauv cua sov, thiab lub zog expansion foob vuam siv.
(3) Tom qab cov khoom siv titanium muaj kuab paug los ntawm cov hlau, nws cov corrosion kuj yuav raug txo, thiab hydrogenation yuav ua rau embrittlement. Qhov loj dua cov pa phem hlau yog, ntau hydrogen titanium absorbs, yog li nws tau ua tiav. Thaum kho thiab tswj cov khoom siv titanium, sim tsis txhob siv cov cuab yeej steel.
Nws tuaj yeem kwv yees tias nrog kev txhim kho ntawm chlor alkali kev lag luam, cov khoom siv titanium muaj qhov kev thov dav dua.
