Lub hauv paus ntsiab lus ntawm electrodialysis desalination thiab desalination?
1. Lub hauv paus ntsiab lus ntawm electrodialysis desalination
Electrodialysis yog ib qho kev hloov pauv uas siv cov kev xaiv permeability ntawm ion pauv daim nyias nyias los tsim cov kev taw qhia kev tsiv teb tsaws ntawm anions thiab cations nyob rau hauv qhov kev txiav txim ntawm DC hluav taws xob teb kom ua tiav kev sib cais, purification thiab concentration. Electrodialysis (EDi luv luv) thev naus laus zis yog hom kev sib cais ntawm cov txheej txheem membrane. Nws hloov pauv cov anion thiab cation txauv membranes ntawm qhov zoo thiab tsis zoo electrodes, thiab cais lawv nrog tshwj xeeb cais los ua ob yam: desalination (desalination) thiab concentration. Department
Nyob rau hauv qhov kev txiav txim ntawm DC hluav taws xob teb, lub peev xwm sib txawv yog siv los ua lub zog tsav, thiab kev xaiv permeability ntawm ion exchange membrane yog siv los cais cov electrolyte los ntawm cov tshuaj, yog li paub qhov concentration, desalination, refining thiab purification ntawm cov tshuaj. .
2. Yuav ua li cas xaiv electrodialysis electrodes
1. Electrodialysis electrodes muab faib ua: platinum-coated titanium electrodes, ruthenium-iridium titanium electrodes, graphite electrodes, thiab stainless hlau electrodes; cov electrodes muaj cov qauv tsim tshwj xeeb raws li qhov loj ntawm electrodialyser.
2. Cov khoom siv electrode sib txawv muaj cov yam ntxwv sib txawv.
Titanium platinum-coated electrode: Nws muaj kev tiv thaiv corrosion zoo heev thiab tuaj yeem siv rau hauv cov xwm txheej hnyav heev. Txawm li cas los xij, platinum yog kim thiab muaj ob peb cov peev txheej, uas txwv nws txoj kev nce qib hauv Suav teb.
Titanium-coated ruthenium electrode: Coated nrog ruthenium (Ru) thiab iridium (Ir) tebchaw ntawm titanium substrate, cov oxide sib xyaw yog tsim tom qab kev kho kub kub; vim hais tias cov ionic radii ntawm ruthenium (Ru) thiab iridium (Ir) yog ze heev, lub ntsiab lus Cov qauv array thiab qhov chaw pab pawg neeg yog tib yam, yog li ib qho kev daws teeb meem ntawm Ru02-Ir02 tuaj yeem tsim thaum lub sijhawm co. - oxidation ntawm kev kho cua sov. Nws muaj kev tiv thaiv corrosion zoo heev thiab tsim nyog ua cov khoom siv electrode.
Graphite electrode: Graphite electrode yog yooj yim corroded, feem ntau yog vim tshuaj corrosion thiab mechanical hnav; Thaum graphite siv los ua anode, vim yog anodic oxidation, graphite yog oxidized rau C02 lossis CO, ua rau nws cov qauv siv lead ua puas thiab puas; nyob rau hauv cov khoom siv electrodialysis Qhov poob ntawm nruab nrab graphite electrodes feem ntau tshwm sim los ntawm kev siv tshuab. High-flow dej muaj zog scouring nyhuv ntawm graphite. Ntawm qhov tod tes, cov tshuaj tiv thaiv electrode tsim
Cov roj av nyoos muaj kev cuam tshuam rau graphite, thiab ua ke nrog electrochemical corrosion, feem ntau ua rau cov khoom graphite tev tawm, ua rau cov dej tsis zoo, thiab tseem thaiv cov dej anode; Nrog kev tshwm sim ntawm cov tshiab insoluble titanium-coated ruthenium oxide electrodes, graphite electrodes tau maj mam tshem tawm.
Stainless hlau electrode: Feem ntau hais lus, stainless hlau tsuas yog siv los ua cathode thiab tsis yog anode. Txwv tsis pub, vim dej ntuj muaj ntau cov chloride ions, cov anode ntawm stainless hlau yuav yaj thiab tsim divalent hlau, npib tsib xee thiab chromium ions. Kev xaiv kom raug ntawm cov khoom siv electrode yog qhov tseem ceeb tshaj plaws rau kev ua haujlwm ntawm lub neej ntawm electrode thiab txo cov peev txheej thiab cov nqi khiav lag luam.
Electrodes ntawm cov khoom sib txawv tuaj yeem siv rau cov dej sib txawv: .
(1) Yog tias chloride yog cov khoom tseem ceeb, titanium-coated ruthenium-iridium electrodes tuaj yeem siv.
(2) Rau electrodes nrog sulfate ua lub ntsiab tivthaiv, titanium-coated iridium-tantalum coated electrodes yuav siv tau.
(3) Rau cov neeg uas muaj bicalcium carbonate ua cov khoom tseem ceeb, titanium-coated ruthenium electrodes tuaj yeem siv.
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