Hauv kev lag luam automation thaj chaw, cov neeg siv feem ntau tsom mus rau qhov tsis zoo xws li ntau yam, qhov tseeb, thiab tawg - pov thawj ntsuas thaum xaiv cov khoom xa tawm siab, thaum saib qhov teeb meem tseem ceeb tshaj plaws -media compatibility. Tshwj xeeb tshaj yog nyob rau hauv acidic media tej yam kev mob, xaiv qhov tsis ncaj ncees lawm diaphragm khoom yuav ua rau kev ntsuas drift, shortened lifespan, los yog txawm heev tshwm sim xws li diaphragm corrosion perforation, media to, thiab kev nyab xeeb xwm txheej.
Qhov tseeb, ntau yam ntawm - teeb meem hauv qhov chaw xws li "siab transmitters tsis kav ntev," "bulging diaphragms," los yog "frequent leaks" tsis yog vim cov khoom tsis zoo, tab sis yog qhov tsis sib xws ntawm cov ntaub ntawv thiab xov xwm. Yog li ntawd, xaivsiab transmittersrau acidic tej yam kev mob yog qhov tseem ceeb ntawm cov ntaub ntawv science thiab tshuaj compatibility.
Kev xaiv tsis raug tuaj yeem ua rau diaphragm puas
I. Yuav xaiv li cas rau Inorganic Acid Media?
Inorganic acids feem ntau yog corrosive heev, qee qhov muaj zog oxidizing zog, xav tau siab heev -cov ntaub ntawv diaphragm.
- Hydrochloric acid (HCl)- Ib qho muaj zog corrosive uas tsis yog - oxidizing acid uas ua phem rau 316L stainless hlau. Txheem stainless hlau diaphragms muaj lub neej luv luv hauv HCl ib puag ncig. Kev lag luam feem ntau pom zooTantalumlos yogHastelloy C276 (HC276)cov diaphragms. Tantalum muaj qhov tshwj xeeb corrosion tsis kam rau HCl thiab feem ntau yog thawj qhov kev xaiv rau cov mob hnyav heev.
- Sulfuric Acid (H₂SO₄)- Nws corrosivity yog complex. Txawm hais tias diluted sulfuric acid yuav zoo li tsis nruj, ob qho tib si dilute thiab siab -kub concentrated sulfuric acid tuaj yeem ua rau cov hlau hnyav heev. Rau sulfuric acid,Tantalumdiaphragms yog ib qho kev xaiv ntau dua. Yog xav tau daim npog tiv thaiv-corrosion,PTFEfeem ntau yog tsim nyog tshaj PFA nyob rau hauv concentrated sulfuric acid.
- Nitric Acid (HNO ₃)- Ib yam muaj zog oxidizing acid. Muaj ntau cov ntaub ntawv uas tiv taus cov acids corrode sai hauv nitric acid. Kev lag luam feem ntau pom zooTitaniumdiaphragms, raws li titanium muaj kev ruaj ntseg zoo tiv thaiv oxidizing media.
- Phosphoric Acid (H₃PO₄)- Tsawg corrosive, tab sis xaiv nyob ntawm qhov concentration thiab kub. Hauv qab 10% concentration, 316L feem ntau txaus. Rau siab dua concentration lossis kub siab,Tantalumpom zoo, raws li corrosion tus nqi nce ho nrog kub.
- Hydrofluoric Acid (HF)-Qhov nruab nrab muaj kev phom sij raug lees paub. Nws yog tshuaj lom heev thiab corrodes feem ntau cov hlau. Cov kev daws teeb meem ib txwm sivMonel nrog kub plating. Ib qho kev daws teeb meem ntau dua yog316L nrog Halar txheej, uas muaj qhov ntev -lub sij hawm kub tsis kam ntawm 150-170℃. Yog tsis muaj lub siab tsis zoo tam sim no,Monel nrog PFA npogkuj yog ib qho kev xaiv.
Lwm cov acids zoo lihydrobromic acid, hydroiodic acid, perchloric acid- Cov corrosive heev, feem ntau xav tauTantalumcov diaphragms. Rau hydroiodic acid, qee cov neeg siv xaiv rau316L nrog PFA npog. Yog tias tsis muaj qhov tsis zoo siab, ntxiv PFA los tiv thaiv- npog tuaj yeem ua tau (ntev -lub sij hawm kub tsis kam 150-180℃).
II. Yuav xaiv li cas rau Organic Acid Media?
Piv rau inorganic acids, cov organic acids feem ntau tsis tshua muaj corrosive, tab sis qhov kub thiab txias tseem tuaj yeem ua rau muaj kev cuam tshuam loj heev.
- Acetic acid- Dilute acetic acid muaj qhov cuam tshuam me ntsis ntawm 316L, yog li 316L txaus rau ib txwm muaj. Rau qhov kub thiab txias lossis glacial acetic acid,Titaniumraug pom zoo, raws li siab -concentration acetic acid corrodes stainless hlau ho.
- Formic Acid-Txoj corrosive. Ntawm chav tsev kub, 316L feem ntau siv tau. Rau qhov kub thiab txias,HC276 los yog Tantalumtau qhia.
- Oxalic acid, citric acid, lactic acid- Feem ntau me ntsis. Ntawm chav tsev kub, 316L yog txaus. Rau qhov kub thiab txias,Hastelloy C (HC)tau pom zoo rau kev ruaj ntseg ntev -.
- Super{0}} muaj zog organic acidszoo li trifluoroacetic acid, trifluoromethanesulfonic acid - Cov hlau tsis tuaj yeem tiv taus lawv ntev -lub sij hawm, yog liTantalumdiaphragms feem ntau pom zoo.
LEEG muaj cov txheej txheem kev xaiv ntau dua
MDM7000 Series diaphragm foobsiab transmittersyog tsim tshwj xeeb rau kev ntsuas ntawm cov txheej txheem tsis xws li siab, theem, huab hwm coj, ntom, interface, thiab ntws raws li txoj haujlwm nyuaj thiab xav tau kev ua haujlwm. Rau cov ntawv thov nyuaj uas suav nrog siab -kub xov xwm, lub tshuab nqus tsev siab, cov kua dej corrosive, cov khoom raug tshem tawm, siab -viscosity media, crystallizing lossis clogging txheej txheem, peb muab ntau hom diaphragm foob tshuab nrog ntau yam qauv tsim, cov ntaub ntawv diaphragm, thiab cov dej xaiv. Cov kev hloov pauv hloov pauv no ua rau muaj kev hloov pauv tau zoo rau cov kev lag luam sib txawv thiab cov txheej txheem kev cai, kom ntseeg tau ntev - lub sij hawm ruaj khov thiab kev ntsuas kev nyab xeeb.
Nyob rau tib lub sijhawm, LEEG tau txais kev txhawb nqa los ntawm ib pab pawg kws tshaj lij ntawm cov kws tshaj lij engineers uas ntsuas qhov tseeb ntawm kev ua haujlwm, cov yam ntxwv ntawm kev tshaj tawm, kev teeb tsa ib puag ncig, thiab cov txheej txheem yuav tsum tau ua thaum pib ntawm txhua qhov haujlwm. Peb cov engineers pab cov neeg siv khoom nrog kev xaiv diaphragm foob thiab kev ua kom zoo tshaj plaws kom xa tau ntau dua, txhim khu kev qha, thiab daim ntawv thov - kev ntsuas ntsuas kev ntsuas. Los ntawm cov khoom teeb tsa mus rau daim ntawv thov teb, peb pab cov neeg siv khoom muaj kev ntseeg siab kov yeej cov kev cov nyom ntawm cov txheej txheem kev lag luam nyuaj.
