Electrodialysis (ED) yog cov txheej txheem uas siv cov khoom siv semipermeable thiab cov hluav taws xob ncaj qha tam sim no los xaiv thauj cov khoom siv hluav taws xob (xws li ions) los ntawm kev daws teeb meem. Cov txheej txheem kev sib cais no concentrates, dilutes, refines, thiab purifies kev daws teeb meem los ntawm directing charged solutes deb ntawm dej thiab lwm yam uas tsis yog-charged Cheebtsam. Electrodialysis tau hloov zuj zus mus rau hauv kev lag luam tshuaj lom neeg loj thiab ua lub luag haujlwm tseem ceeb hauv kev siv tshuab sib cais membrane. Nws pom dav siv hauv kev lag luam xws li tshuaj desalination, seawater desalination, zaub mov thiab tshuaj, thiab kev kho dej khib nyiab. Hauv qee thaj chaw, nws tau dhau los ua txoj hauv kev tsim cov dej haus. Nws muaj qhov zoo xws li kev siv hluav taws xob tsawg, cov txiaj ntsig kev lag luam tseem ceeb, kev kho kom yooj yim, cov cuab yeej siv tau ntev, kev tsim qauv yooj yim, kev ua haujlwm yooj yim thiab kev saib xyuas, txheej txheem huv, kev siv tshuaj lom neeg tsawg, muaj kuab paug ib puag ncig, kev siv lub neej ntev, thiab cov dej rov qab siab (feem ntau. los ntawm 65% mus rau 80%).
Cov txheej txheem electrodialysis feem ntau muaj xws li electrodeionization (EDI), electrodialysis reversal (EDR), electrodialysis nrog kua membranes (EDLM), high-temperature electrodialysis, yob hom electrodialysis, bipolar membrane electrodialysis, thiab lwm yam.
Electrodialysis tuaj yeem siv rau kev kho mob ntawm ntau hom dej khib nyiab, nrog rau cov dej khib nyiab electroplating thiab cov dej khib nyiab hnyav hlau. Nws tuaj yeem ua haujlwm los rho tawm cov hlau ions thiab lwm yam khoom siv los ntawm cov dej khib nyiab, tso cai rau kev rov qab thiab rov siv cov dej thiab cov peev txheej tseem ceeb thaum txo cov pa phem thiab emissions. Cov kev tshawb fawb tau pom tias electrodialysis tuaj yeem rov qab tau tooj liab, zinc, thiab txawm tias oxidize Cr3 + rau Cr6 + thaum kho cov kev daws teeb meem hauv cov txheej txheem tooj liab. Tsis tas li ntawd, electrodialysis tau ua ke nrog kev sib pauv ion rau kev rov qab los ntawm cov hlau hnyav thiab cov kua qaub los ntawm cov kua qaub pickling cov dej khib nyiab hauv kev lag luam. Cov khoom siv tshwj xeeb tsim electrodialysis, siv ob qho tib si anion thiab cation txauv resins ua cov khoom ntim, tau siv los kho cov dej khib nyiab hnyav, ua tiav cov voj voog rov ua dua thiab xoom paug. Electrodialysis tuaj yeem siv los kho cov dej khib nyiab alkaline thiab cov dej khib nyiab organic.
Kev tshawb fawb tau ua nyob rau hauv Lub Xeev Lub Tuam Txhab Tseem Ceeb ntawm Kev Tiv Thaiv Kev Tiv Thaiv thiab Kev Siv Khoom Siv Hauv Tuam Tshoj tau kawm txog kev kho cov alkali ntxuav cov dej khib nyiab uas muaj epoxy propane chlorination tail gas siv ion exchange membrane electrolysis. Thaum cov hluav taws xob electrolysis yog 5.0V thiab lub sij hawm ncig yog 3 teev, COD tshem tawm cov dej khib nyiab mus txog 78%, thiab cov alkali rov qab yog siab li 73.55%, ua kev kho mob zoo rau cov tom ntej biochemical units. Electrodialysis thev naus laus zis kuj tau siv los kho cov khoom siv hluav taws xob ntau cov organic acid khib nyiab, nrog cov concentration ntawm 3% mus rau 15%, los ntawm Shandong Luhua Petrochemical Company. Txoj kev no ua rau tsis muaj cov khoom seem lossis cov pa phem thib ob, thiab cov kev daws teeb meem tau txais muaj 20% mus rau 40% acid, uas tuaj yeem siv dua thiab kho, txo cov kua qaub hauv cov dej khib nyiab mus rau 0.05% mus rau 0.3%. Tsis tas li ntawd, Sinopec Sichuan Petrochemical Company tau siv cov cuab yeej tshwj xeeb electrodialysis los kho cov dej khib nyiab, ua kom muaj peev xwm kho tau siab tshaj plaws ntawm 36 t / h, nrog rau cov ntsiab lus ammonium nitrate hauv cov dej concentrated txog li 20%, thiab ua tiav qhov kev rov qab los ntawm ntau dua 96. %. Cov dej qab zib kho tau muaj ammonium nitrogen loj feem ntawm ≤40mg / L, ua tau raws li cov qauv ib puag ncig.
Post lub sij hawm: Sep-07-2023
