Cov khoom siv zoo heev rau anodes hauv kev lag luam chlor-alkali-titanium

Lub melting point ntawm titanium yog 1680 degree thiab qhov ceev yog 4.54g / cm3. Nws hnyav dua li txhuas tab sis 43% sib dua li hlau. Titanium muaj zog heev, 6 npaug zog dua li txhuas. Yog li ntawd, ntawm cov khoom siv, titanium muaj lub zog tshwj xeeb heev. Lwm qhov zoo dua ntawm titanium yog nws muaj zog corrosion tsis kam rau ntau yam khoom.

Titanium yog dav siv nyob rau hauv kev lag luam chlor-alkali, thawj zaug vim nws cov corrosion kuj zoo heev rau cov tshuaj chlorine ntub thiab sodium chloride, thiab qhov thib ob vim nws cov khoom siv hluav taws xob ua rau nws tsim nyog siv los ua cov khoom siv anode. Tebchaws Asmeskas pib tsim cov khoom siv chlor-alkali thaum ntxov li xyoo 1960, thiab daim ntawv thov no tau tsim sai heev, nrog rau kev loj hlob txhua xyoo ntawm 8%. Hauv xyoo 2021, kwv yees li 50% ntawm lub ntiaj teb chlorine ntau lawm siv ruthenium-titanium coated anodes. Hauv Lavxias teb sab chlorine ntau lawm, ntau tshaj 80% ntawm cov khoom siv thiab cov kav dej yog ua los ntawm titanium. Tag nrho cov chlor-alkali kev lag luam, uas tsim cov tshuaj chlorine thiab lwm yam oxides, tshuaj lom neeg, chloramines thiab bleaching hmoov, account rau ntau tshaj 60% ntawm cov titanium khoom siv nyob rau hauv cov tshuaj sector. Hauv kev lag luam chlor-alkali, Nyiv siv titanium anodes, uas yog cov khoom siv titanium tshaj plaws hauv Nyij Pooj. Txij li thaum xyoo 1980s, kuv lub teb chaws kev lag luam chlor-alkali tau pib siv titanium anodes thiab tau txais txiaj ntsig zoo ntawm kev lag luam.

Titanium anode is currently the single product that uses the most titanium in the chemical industry. In the past, graphite anodes were commonly used in chlor-alkali industrial electrolyzers, which had short lifespan and high power consumption. The advantages of using titanium anodes are: anode size stability, long life, low power and steam consumption, high product quality, large production capacity, and good working conditions. After Shanghai Liaoyuan Chemical Company switched its 20-meter-long electrolytic cell to titanium anodes, experts determined that its production capacity doubled compared to that of graphite anode electrolytic cells. The current density of graphite electrodes is mostly 1100A/m2, and the current density of titanium anodes can reach >2000A/m2; the anode has a long life. Graphite anodes can only be used for about 0.5 years, while titanium anodes can be used for >4 xyoo; txuag li 15% ntawm hluav taws xob thiab li 5% ntawm chav. Cov khoom zoo yog qhov zoo. Lub caustic soda tsim los ntawm graphite anode tank yog xim liab, thaum lub caustic soda uas ua los ntawm titanium anode tank yog xim tsis muaj xim thiab muaj cov organic impurity tsawg; asbestos diaphragm muaj lub neej ntev. Lub graphite anode tank diaphragm tsuas yog siv tau li ntawm 180 hnub, thaum lub titanium anode tank diaphragm muaj lub neej ntev kev pab cuam vim nws tsis thaiv los ntawm graphite hais, uas tsis tsuas yog txuag asbestos, tab sis kuj yuav tsum tau ua haujlwm tsawg dua; titanium anodes tsis siv asphalt thiab txhuas, thiab yog ntsuab thiab ib puag ncig tus phooj ywg.

Hauv kev tsim cov tshuaj chlorine ntawm lub tuam txhab chlor-alkali, cov tshuaj chlorine tso tawm los ntawm electrolytic cell tsis tsuas yog muaj qhov kub thiab txias, tab sis kuj muaj cov dej noo ntau. Yuav tsum tau txias thiab qhuav ua ntej siv. Cov txheej txheem txias muaj xws li txoj kev ncaj nraim thiab txoj kev tsis ncaj. Kev tso dej ncaj qha rau cov dej txias yuav tsis tsuas yog tsim cov dej uas muaj chlorine ntau, tab sis kuj ua rau ib puag ncig. Kev poob ntawm cov tshuaj chlorine yog qhov loj, kev noj H2SO4 loj, thiab kev ua haujlwm kuj tsis zoo. Yog tias stainless hlau tsis ncaj qha txias txias yog siv los ua kom txias, lub neej kev pab cuam yog qhov nyuaj tshaj 10 hnub, thaum lub graphite cooler tsuas yog siv tau li ntawm 90 hnub. Titanium yog cov khoom siv zoo tshaj plaws rau kev tsim cov cua txias thiab muaj zog tiv thaiv cov tshuaj chlorine ntub dej, nrog rau corrosion tus nqi tsawg dua lossis sib npaug li 0.0025 hli / xyoo. Yog li ntawd, kev siv cov titanium coolers nyob rau hauv chlor-alkali ua yuav txo tau lub sij hawm txias thiab qhuav, txo cov chlorine poob, thiab txo ib puag ncig muaj kuab paug. Qhov thib ob, nws tuaj yeem tsim cov xwm txheej tsim nyog rau kev ua haujlwm ruaj khov thiab ua tiav ziab ntawm cov pa roj compressed.

In the U.S. chemical industry, >50% ntawm titanium yog siv nyob rau hauv txias txias rau chlor-alkali ntau lawm. Allied cov raj cua txias ua los ntawm graphite tsuas yog siv sijhawm li 2 txog 3 xyoos. Tom qab hloov mus rau titanium raj, lawv tuaj yeem siv rau ntau tshaj 10 xyoo. Kev siv cov phab ntsa titanium nyias nyias tshem tawm qhov xav tau rau hauv cov graphite strips ntawm qhov txias thiab tuaj yeem tiv taus cov cua kub kub heev. Piv txwv li, 78m2 titanium txias txias ua cua sov ntau npaum li 140m2 graphite txias. Cov cua txias siv nyob rau hauv Soviet Union thiab Russia lub chlor-alkali kev lag luam yog tag nrho cov ua los ntawm titanium. Wet chlorine cooling economic indicators, As Shanghai Liaoyuan Chemical Company graphite raj, titanium raj txias txias technical thiab economic ntsuas. Nws tuaj yeem pom los ntawm cov ntaub ntawv no tias kev ua kom txias tsis ncaj nrog cov tshuaj chlorine ntub dej yog qhov zoo dua li cov tshuaj tsuag ncaj qha nrog dej.

Tom qab Shanghai Liaoyuan Chemical Company tau hloov mus rau qhov tsis ncaj qha titanium txias txias, nws tuaj yeem txuag tau 400, 000 tons / xyoo dej, 1,360 tons / xyoo ntawm sulfuric acid kom qhuav, thiab 1,400 tons / xyoo ntawm cov roj chlorine. Titanium tube coolers kav ntev npaum li graphite tube coolers.
Pumps, valves, thiab lwm yam.

Titanium twj tso kua mis uas siv cov txheej txheem membrane lossis mercury electrolysis los tsim cov tshuaj chlorine tuaj yeem ua tiav cov txiaj ntsig zoo tshaj plaws. Lub twj tso kua mis titanium los ntawm Asmeskas tuam txhab Piffic muaj lub neej ua haujlwm txog li 10 xyoo. Beijing Chemical Plant No. 2 siv cam khwb cia titanium 6BA-12 twj, Dg100 thiab Dg150 nres li qub, thiab HTB-7011 dej nplhaib ceramic nqus twj tso kua mis titanium impellers hauv cov txheej txheem nqus dechlorination. Tom qab 1.5 xyoo ntawm kev ua haujlwm, lawv tseem nyob tsis tau. Tsis muaj cov cim qhia ntawm corrosion. Ntau yam titanium li qub tuaj yeem siv tau zoo nyob rau hauv kev kub ntxhov los ntawm ib txwm siab mus rau 5000N / cm2.