Kungani i-nanofiltration membranes kufanele ihlanzwe njalo?
Ngenxa yokuthi ulwelwesi lwe-nanofiltration luzosetshenziswa isikhathi eside ngesikhathi sokusetshenziswa, izinto eziqinile ezimisiwe kanye nokungcola okuthile emanzini kuzovimba usayizi wembotshana we-membrane yesihlungi, okubangele ukuthi ulwelwesi luvimbe, futhi ukuvinjelwa isikhathi eside kubangela ukukhiqizwa kwamanzi kwehle, futhi kuzothinta isici se-nanofiltration membrane.Dala umonakalo ongalungiseki.
Ude kangakanani umjikelezo wokuhlanza we-nanofiltration membranes?
Ngokuvamile, umjikelezo wokuhlanza we-nanofiltration membrane unqunywa ngokuyinhloko ngokusetshenziswa kwe-membrane element, ngokuvamile cishe izinyanga ezintathu, kodwa lapho ukukhiqizwa kwamanzi kwe-membrane element kuncipha, i-nanofiltration membrane kufanele ihlanzwe ngesikhathi.
Yini okufanele ngiyinake lapho ngihlanza i-nanofiltration membrane?
Sebenzisa amanzi ane-oxidant ekhwalithi ephezulu angenayo i-chlorine esele kanye nezinye izinto ezixutshanisiwe ukuze uwahlanze
Lapho ulungiselela isisombululo sokuhlanza, qiniseka ukuthi wonke amakhemikhali okuhlanza ahlakazeka kahle futhi axutshwe ngaphambi kokungena kumjikelezo wengxenye.
Ngemva kokuba amakhemikhali okuhlanza kanye nezakhi zolwelwesi zisakazwa, izakhi zolwelwesi kufanele zigezwe ngamanzi ekhwalithi ephezulu angenayo i-chlorine esele nezinye izinto ezisizayo (izinga lokushisa eliphansi>20℃).
Izinga lokushisa kanye nevelu engu-PH
Phakathi nomjikelezo wesisombululo sokuhlanza, izinga lokushisa akufanele lidlule i-50C ku-pH 2-10, izinga lokushisa akufanele lidlule i-35C ku-pH 1-11, futhi izinga lokushisa akufanele lidlule i-30C ku-pH 1-12.
Isiqondiso sokugeleza koketshezi lokuhlanza
Ezingxenyeni ezinobubanzi obungaphezu kwama-intshi angu-6, ukugeleza koketshezi lokuhlanza kufanele kufane nendlela evamile yokugijima ukuvimbela ingxenye ekukhiqizeni "isibonakude", ngoba indandatho yokuphonsela emkhunjini wokucindezela ifakwe kuphela ukuphela kwamanzi okugxilile komkhumbi wokucindezela.Kunconywa futhi ukuthi unake leli phuzu lapho uhlanza uhlelo lwezingxenye ezincane.
Hlanza kahle okokugeza okusele
Lapho uhlanza, qaphela ukuhlanza kahle i-ejenti yokuhlanza esele kulwelwesi.Uma i-ejenti yokuhlanza ingahlanzwa kahle, kulula kakhulu ukuqoqa ukungcola ohlelweni lwe-membrane-forming, futhi unciphise impilo yesevisi ye-nanofiltration membrane.Abahlanzi be-alkaline banamandla aphansi okuhlanza okususa amabala.
Unganweba kanjani umjikelezo wokuhlanza we-nanofiltration membranes?
Khulisa ukwelashwa kwangaphambili
Ukwandisa inqubo yokwelapha ngaphambi kwesikhathi ngokuvamile kuyisikhathi eside esisetshenziswa, futhi amanzi aluhlaza angaphathwa ngaphambilini ngezinqubo ezifana nezihlungi zemidiya eminingi kanye nolwelwesi lwe-ultrafiltration ukuze kuthuthukiswe ikhwalithi yamanzi, okunganciphisa ngempumelelo ukungcoliswa kwezakhi ze-nanofiltration membrane.
Engeza i-asidi
I-CaCO3 emanzini amaningi angaphezulu nangaphansi komhlaba icishe igcwale.Ngakho-ke, ngokungeza iqabunga H ku-asidi, ibhalansi yamakhemikhali ingashintshelwa kwesokunxele ukuze kugcinwe i-calcium carbonate isesimweni sokuncibilika.Izinga le-asidi esetshenzisiwe kufanele libe yizinga lokudla.Emazweni amaningi nasezifundeni, i-sulfuric acid kulula ukuyisebenzisa kune-hydrochloric acid, kodwa ngakolunye uhlangothi, okuqukethwe kwe-sulfate radicals emanzini anethonya kuyanda.Ngokuqondene nesilinganiso se-sulfate, inkinga izoba nkulu.
Engeza i-antiscant
I-Scale inhibitors ingasetshenziswa ukulawula isikali se-carbonate, isikali se-sulfate, nesikali se-calcium fluoride.Ngokuvamile kunezinhlobo ezintathu ze-scale inhibitors: i-sodium hexametaphosphate (SHMP), i-organic phosphate, ne-polyacrylate.Ilungele ukuvimbela ukukalwa kwe-aluminium ne-iron enganyibiliki, futhi i-polyacrylate yesisindo samangqamuzana ephezulu inganciphisa ukwakheka kwesikali se-SiO2 ngomphumela wokuhlakazeka.
Engeza i-resin ethambile
I-Na+z ion ingasetshenziselwa ukufaka esikhundleni nokususa amakheshini esikali afana ne-Ca2+, Ba2+, ne-Sr2+ emanzini.Phakathi nalokhu kwelashwa, i-pH yamanzi anethonya ngeke ishintshe.Ngakho-ke, akukho msebenzi wokukhipha umoya odingekayo.
Isikhathi sokuthumela: Jun-28-2021