Electrodialysis (ED) waa nidaam adeegsada xuubka semipermeable iyo goob koronto oo toos ah oo hadda jirta si xulashada walxaha solute-ka ah (sida ions) looga qaado xalka. Nidaamkan kala soocida waxa uu xooga saarayaa, milo, sifeeyaa, oo nadiifiyaa xalalka isaga oo ka jihaynaya milannada la dallacay ee ka fog biyaha iyo qaybaha kale ee aan la dallacin. Electrodialysis waxa uu u xuubsiibtey hawl-gal unug kiimikaad oo baaxad weyn waxana ay door weyn ka ciyaartaa tignoolajiyada kala soocida xuubka. Waxay ka helaysaa codsi ballaadhan warshadaha sida nadiifinta kiimikada, nadiifinta biyaha badda, cuntada iyo dawooyinka, iyo daaweynta biyaha wasakhda ah. Gobollada qaarkood, waxay noqotay habka ugu horreeya ee soo saarista biyaha la cabbo. Waxay bixisaa faa'iidooyin sida isticmaalka tamarta yar, faa'iidooyin dhaqaale oo muhiim ah, ka-hortag fudud, qalab waara, naqshadeynta nidaamka dabacsan, hawl fudud iyo dayactirka, habka nadiifka ah, isticmaalka kiimikada hooseeya, wasakhowga deegaanka ugu yar, cimri dhererka qalabka, iyo heerka soo kabashada biyaha sare (sida caadiga ah inta u dhaxaysa 65% ilaa 80%).
Farsamooyinka elektrodialysis ee caadiga ah waxaa ka mid ah electrodeionization (EDI), dib-u-celinta electrodialysis (EDR), electrodialysis oo leh xuubka dareeraha (EDLM), electrodialysis heerkulka sare, electrodialysis nooca duuban, xuubka laba-cirifoodka electrodialysis, iyo kuwa kale.
Electrodialysis waxaa loo isticmaali karaa daawaynta noocyada kala duwan ee biyaha wasakhda ah, oo ay ku jiraan biyaha wasakhda ah ee korontada ku shaqeeya iyo biyaha wasakhaysan ee birta culus leh. Waxaa loo adeegsan karaa in laga soo saaro ions birta iyo walxaha kale ee biyaha wasakhda ah, taas oo u oggolaanaysa soo kabashada iyo dib u isticmaalka biyaha iyo kheyraadka qiimaha leh iyada oo la yareynayo wasakhowga iyo qiiqa. Daraasaduhu waxay muujiyeen in electrodialysis ay ka soo kaban karto naxaasta, zinc, iyo xitaa oxidize Cr3 + ilaa Cr6 + inta lagu jiro daaweynta xalalka passivation ee habka wax soo saarka naxaasta. Intaa waxaa dheer, electrodialysis waxaa lagu daray ion beddelka dib u soo kabashada biraha culus iyo asiidhyada ka soo guraya biyaha wasakhda ah ee codsiyada warshadaha. Aalado si gaar ah loo nashqadeeyay, oo isticmaalaya xabagta anion iyo cation-ka beddelka labadaba sida buuxinyaal ahaan, ayaa loo isticmaalay in lagu daweeyo biyaha wasakhda ah ee birta ah, gaaritaanka dib-u-warshadaynta-xiran iyo dheecaan eber ah. Electrodialysis sidoo kale waxaa lagu dabaqi karaa si loo daaweeyo biyaha wasakhda ah ee alkaline iyo biyaha wasakhda ah ee dabiiciga ah.
Cilmi-baadhis lagu sameeyay Shaybaadhka Muhiimka ah ee Gobolka ee Xakamaynta Wasakhaynta iyo Dib-u-Celinta Khayraadka ee Shiinaha ayaa daraasad ku sameeyay daaweynta alkali dhaqida biyaha wasakhda ah ee ay ku jiraan gaaska dabada ee chlorination epoxy propane iyadoo la adeegsanayo korantada beddelka ion. Markii danabka korantada korantada uu ahaa 5.0V wakhtiga wareegguna uu ahaa 3 saacadood, heerka ka saarista COD ee biyaha wasakhda ah ayaa gaadhay 78%, heerka soo kabashada alkalina waxa uu ahaa mid aad u sarreeya ilaa 73.55%, isaga oo u adeegaya sidii pretreatment wax ku ool ah unugyada biochemical ee xiga. Tignoolajiyada Electrodialysis ayaa sidoo kale loo isticmaalay in lagu daweeyo biyaha wasakhda ah ee aashitada dabiiciga ah ee kakan, iyada oo la uruurinayo inta u dhaxaysa 3% ilaa 15%, oo ay leedahay Shirkadda Shandong Luhua Petrochemical. Habkani ma keenayo hadhaaga ama wasakhda labaad, iyo xalalka xoogga leh ee la helay ayaa ka kooban 20% ilaa 40% acid, taas oo dib loo warshadeyn karo oo la daweyn karo, hoos u dhigista asiidhka ku jira biyaha wasakhda ilaa 0.05% ilaa 0.3%. Intaa waxaa dheer, Shirkadda Sinopec Sichuan Petrochemical waxay isticmaashay qalab gaar ah oo loo yaqaan 'electrodialysis' si loogu daaweeyo biyaha wasakhda ah ee kondensate, taasoo gaartay awoodda daaweynta ugu badan ee 36 t / h, iyada oo maadada amooniyamka ah ee ku jirta biyaha xoogga leh ay gaartay in ka badan 20%, iyo helitaanka heerka soo kabashada ee ka badan 96 %. Biyaha nadiifka ah ee la daweeyay waxay lahaayeen jajab tiro badan oo nitrogen ammonium ah oo ah ≤40mg/L, oo buuxinaya heerarka deegaanka.
Waqtiga boostada: Sebtembar-07-2023
