Thaum tshav kub kub exchangers (tseem hu ua heat exchangers lossis heat exchangers) yog cov cuab yeej siv los hloov cov cua sov los ntawm cov kua dej kub mus rau cov kua dej txias kom ua tau raws li cov txheej txheem uas yuav tsum tau ua thiab yog cov ntawv thov kev lag luam ntawm cov hluav taws xob hloov hluav taws xob thiab hluav taws xob hluav taws xob.
Thaum tshav kub kub hloov pauv tuaj yeem ua haujlwm nyuaj thaum cuam tshuam nrog cov xov xwm corrosive xws li acids, chlorinated compounds thiab cov kua dej vaporized. Corrosion tuaj yeem ua rau poob ntawm cov neeg kho tshuab kev ncaj ncees thiab scaling. Scaling yog qhov tshwm sim ntawm kev tso cov khoom tsis xav tau rau ntawm qhov chaw. Qhov no tuaj yeem hloov pauv cov coefficient ntawm lub tshav kub thiab cuam tshuam rau kev ua haujlwm ntawm cov khoom siv hluav taws xob.
1. Cov khoom siv corrosion
Corrosion ntawm li qub thiab khoom siv yog ib qho teeb meem tshwm sim rau cov tshuaj lom neeg, refining, roj thiab roj ntsig txog kev lag luam.
Raws li kwv yees li kev tiv thaiv kev txheeb cais, Asmeskas cov tub rog tau khawb ntau dua 5% ntawm nws cov cuab yeej txhua xyoo vim yog hlau corrosion, uas tseem ua rau muaj kev nce nqi ntawm kev kho thiab tiv thaiv riam phom thiab khoom siv. Raws li US Department of Defense, US Naval Service poob kwv yees li US $ 7 billion ib xyoos ib zaug vim corrosion, ntawm uas US $ 500 lab yog siv rau kho corroded Marine Corps av tsheb.
2.Qhov hnyav ntawm corrosion
Tuam Tshoj Academy ntawm Engineering qhov kev sab laj loj tshaj plaws Huan Baorong, Wang Jingquan thiab lwm tus kws tshaj lij ntawm kev tshawb fawb kev lag luam "peb cov xwm txheej corrosion thiab kev tswj xyuas kev tshawb fawb" cov txiaj ntsig tau pom tias xyoo 2014, Tuam Tshoj qhov kev poob vim yog corrosion mus txog 2.1 trillion yuan, suav txog li 3.34. % ntawm GDP ntawm lub xyoo.
Raws li kev tshawb fawb hauv Tebchaws Meskas, qhov kev poob los ntawm kev xeb tuaj yeem ncav cuag li 6% ntawm US GDP. Nyob rau tib lub sij hawm, thoob ntiaj teb, txhua xyoo corrosion poob tag nrho ntau dua US $ 4 trillion.
3.Qhov zoo ntawm tantalum plating tshuab
Tantalum tau lees paub tias yog cov hlau uas muaj corrosion-resistant tshaj plaws
Tsawg kub tshuaj vapor deposition (CVD luv luv)
Nto alloy npaj
Nws muaj lub cev muaj zog ntawm tantalum hlau
Muaj txiaj ntsig hauv kev txhim kho cov khoom siv kho tshuab ntawm lub substrate
Zoo heev deformation thiab khoov muaj peev xwm
Unrivaled tsis kam rau corrosion, kub thiab siab
Qhov kev xaiv zoo tshaj plaws rau kev pabcuam hnyav
4.Qhov zoo ntawm tantalum-plated kub exchangers
Kev ua tau zoo ntawm tantalum-plated cov khoom nyob rau hauv ntau qhov chaw
Nickel-based alloys, zirconium thiab titanium thermowells muaj kev cuam tshuam rau kev ntxhov siab corrosion cracking (SCC) thiab pitting, tshwj xeeb tshaj yog nyob rau hauv kub acids. Tantalum, ntawm qhov tod tes, ua tau zoo heev hauv cov kua qaub kub.
Kev ua tau zoo hauv corrosive media
Corrosion
Chemically resistant rau SCC thiab pitting nyob rau hauv ntau corrosive media thiab ib puag ncig.
Nyob rau hauv high kub acidic tej yam kev mob
kua qaub
Tantalum layers remain passivated and inert to corrosion under acidic conditions (including concentrated HCl and H2SO4) at high temperatures (>200 degree).
Nyob rau hauv ib puag ncig uas muaj chlorine
Chlorine
Cov tshuaj tiv thaiv zoo heev rau cov av noo, cov tshuaj chlorine qhuav thiab lwm qhov chaw chlorinated.
Daim ntawv thov ib puag ncig rau tantalum-plated heat exchangers
Kev ua tshuaj lom neeg
Pickling chlorinated kuab tshuaj, muaj zog acids xws li HCl, H2SO4, HNO3, kub corrosive pov tseg kua
Roj av
Cov pa roj
Cua kub flue gases (CO2, H2S, SO2), kev kho ammonia
Pharmaceuticals
Volatile oxidising tebchaw xws li dichloromethane thiab methanol
Semi-conductors
Kev npaj muaj zog HCl etchant, kev ua ntawm silicon deposition by-products
Kev lag luam dav dav
Kub volatile chlorides, corrosive ntsev, sulfide, methanation
5.Cov ntawv thov rau tantalum-plated heat exchangers
Acid tshav kub exchangers Reboilers Acid evaporators
Cov txheej txheem khoom Condensers Regenerative cua sov hloov
Digester cua sov Cov dej khib nyiab pov tseg thaum tshav kub kub rov qab
Txheej txheem dej cua sov thiab cua txias
