I-Electrodialysis (ED) iyinqubo esebenzisa ulwelwesi olungenakunyakaziswa kanye nenkundla kagesi yamanje ukuthutha ngokukhetha izinhlayiya ze-solute ezishajwa (njengama-ion) zisuka esixazululweni. Le nqubo yokuhlukanisa igxilisa, ihlambulule, icwenge, futhi ihlanze izixazululo ngokuqondisa izincibilikisi ezishajiwe zisuke emanzini nezinye izingxenye ezingashajiwe. I-Electrodialysis iguqukele ekusebenzeni kweyunithi yamakhemikhali enkulu futhi idlala indima ebalulekile kubuchwepheshe bokuhlukanisa ulwelwesi. Ithola ukusetshenziswa okubanzi ezimbonini ezinjengokukhipha usawoti emanzini amakhemikhali, ukukhipha usawoti emanzini olwandle, ukudla nemithi, nokuhlanza amanzi angcolile. Kwezinye izifunda, sekuyindlela eyinhloko yokukhiqiza amanzi okuphuza. Inikeza izinzuzo ezinjengokusetshenziswa kwamandla okuphansi, izinzuzo zezomnotho ezibalulekile, ukwelashwa kusengaphambili okulula, okokusebenza okuqinile, idizayini yesistimu evumelana nezimo, ukusebenza kalula nokunakekelwa, inqubo ehlanzekile, ukusetshenziswa kwamakhemikhali okuphansi, ukungcoliswa kwemvelo okuncane, ubude besikhathi bedivayisi, kanye namazinga aphezulu okubuyisela amanzi (ngokuvamile). kusuka ku-65% kuya ku-80%).
Amasu avamile we-electrodialysis ahlanganisa i-electrodeionization (EDI), i-electrodialysis reversal (EDR), i-electrodialysis ene-liquid membranes (EDLM), i-electrodialysis yokushisa ephezulu, i-roll-type electrodialysis, i-bipolar membrane electrodialysis, nezinye.
I-Electrodialysis ingasetshenziselwa ukwelapha izinhlobo ezahlukene zamanzi angcolile, okuhlanganisa amanzi angcolile e-electroplating kanye namanzi angcolile anensimbi esindayo. Ingasetshenziselwa ukukhipha ama-ion ensimbi nezinye izinto emanzini angcolile, okuvumela ukutholwa kanye nokusetshenziswa kabusha kwamanzi nezinsiza ezibalulekile kuyilapho kunciphisa ukungcoliswa kwemvelo kanye nokukhishwa kwegesi. Ucwaningo lubonise ukuthi i-electrodialysis ingabuyisa ithusi, i-zinc, ngisho ne-oxidize i-Cr3+ iye ku-Cr6+ ngesikhathi sokwelashwa kwezixazululo ze-passivation kunqubo yokukhiqiza yethusi. Ngaphezu kwalokho, i-electrodialysis ihlanganiswe nokushintshisana kwe-ion ukuze kutholwe izinsimbi ezisindayo nama-acids emanzini angcolile okucolwa nge-asidi ezisetshenziswa zezimboni. Imishini ye-electrodialysis eklanywe ngokukhethekile, esebenzisa kokubili ama-anion exchange resins njengama-filler, asetshenziselwe ukwelapha amanzi angcolile ensimbi esindayo, ukufeza ukugaywa kabusha kwe-loop evaliwe kanye nokukhipha iqanda. I-Electrodialysis ingasetshenziswa futhi ukwelapha amanzi angcolile ane-alkali kanye namanzi angcolile aphilayo.
Ucwaningo olwenziwe e-State Key Laboratory of Pollution Control and Resource Reuse in China luhlolisise ukwelashwa kwamanzi angcolile okugeza ane-alkali aqukethe igesi yomsila ye-epoxy propane chlorination kusetshenziswa i-ion exchange membrane electrolysis. Lapho i-electrolysis voltage ingu-5.0V futhi isikhathi sokujikeleza singamahora angu-3, izinga lokukhishwa kwe-COD lamanzi angcolile lafinyelela ku-78%, futhi izinga lokutholwa kwe-alkali laliphezulu lafika ku-73.55%, lisebenza njengendlela yokwelapha ephumelelayo yamayunithi amakhemikhali e-biochemical alandelayo. Ubuchwepheshe be-Electrodialysis buye basetshenziselwe ukwelapha amanzi angcolile ane-asidi ephilayo ane-concentrate ephezulu, agxiliswe kusukela ku-3% kuya ku-15%, yi-Shandong Luhua Petrochemical Company. Le ndlela iholela ekungabini kwezinsalela noma ukungcoliswa kwesibili, futhi isixazululo esigxilile esitholiwe siqukethe i-asidi engu-20% kuya ku-40%, engagaywa kabusha futhi ilashwe, ukunciphisa okuqukethwe kwe-asidi emanzini angcolile kuya ku-0.05% kuya ku-0.3%. Ngaphezu kwalokho, iSinopec Sichuan Petrochemical Company yasebenzisa umshini okhethekile we-electrodialysis ukwelapha amanzi angcolile, yafinyelela umthamo omkhulu wokwelapha ongu-36 t/h, nokuqukethwe kwe-ammonium nitrate emanzini agxilile ifinyelela ngaphezu kuka-20%, futhi yazuza izinga lokululama elingaphezu kuka-96. %. Amanzi ahlanzekile ahlanzekile abenengxenye yesisindo se-ammonium nitrogen engu-≤40mg/L, ehlangabezana namazinga emvelo.
Isikhathi sokuthumela: Sep-07-2023
