Emikhiqizweni yezolimo neseceleni, iwayini, uviniga nesoso yesoya kubiliswa ngesitashi, sokusanhlamvu.Ukuhlunga kwale mikhiqizo kuyinqubo ebalulekile yokukhiqiza, futhi ikhwalithi yokuhlunga ithinta ngqo ikhwalithi yemikhiqizo.Izindlela zokuhlunga zendabuko zihlanganisa ukuthungwa kwemvelo, i-adsorption esebenzayo, ukuhlunga kwe-diatomite, ukuhlunga kwepuleti kanye nohlaka, njll. Lezi zindlela zokuhlunga zinezinkinga ezithile ngamazinga ahlukene wesikhathi, ukusebenza, ukuvikelwa kwemvelo kanye nezinye izici, ngakho-ke kuyadingeka ukukhetha ukuhlunga okuthuthuke kakhulu. indlela.
Ifayibha engenalutho inganqamula izinto ezinkulu zamangqamuzana nokungcola phakathi kuka-0.002 ~ 0.1μm, futhi ivumele izinto ezincane zamangqamuzana nezinto eziqinile ezincibilikisiwe (usawoti wezinto ezingaphili) ukuze kudlule uketshezi oluhlungiwe lukwazi ukugcina umbala walo wangempela, iphunga nokunambitha, futhi kufezeke inhloso. yokuvala inzalo engenakushisa.Ngakho-ke, ukusebenzisa isihlungi se-fiber esingenalutho ukuhlunga iwayini, uviniga, isoso yesoya kuyindlela yokuhlunga ethuthuke kakhulu.
I-Polyethersulfone (PES) yakhethwa njenge-membrane material, futhi ulwelwesi olungenalutho lwe-fiber ultrafiltration olwenziwe ngale nto lunamakhemikhali aphezulu, amelana nama-hydrocarbons ane-chlorinated, ama-ketones, ama-acids nezinye izincibilikisi eziphilayo, futhi azinzile kuma-acids, izisekelo, ama-aliphatic hydrocarbons, amafutha. , utshwala nokunye.Ukuzinza okuhle kokushisa, ukumelana kahle nomusi namanzi ashisayo (150 ~ 160 ℃), izinga lokugeleza okusheshayo, amandla aphezulu emishini.I-membrane yesihlungi kulula ukuyihlanza nge-fiber membrane ye-pressure engenalutho, futhi igobolondo le-membrane, ipayipi kanye ne-valve zenziwe ngensimbi engagqwali engu-304, ehlanzekile futhi kulula ukuyihlanza.
Ukuze iwayini, uviniga, isoso soya izinhlobonhlobo amino acid, organic acid, ushukela, amavithamini, izinto eziphilayo ezifana utshwala ne-ester kanye nengxube yamanzi, futhi yamukela cross-flow filtration indlela, ngokusebenzisa futha kuyodingeka ukuhlunga amapayipi awuketshezi kulwelwesi lokuhlunga, ulwelwesi oluhlungiwe lomkhiqizo oqediwe, hhayi ngoketshezi oluya epayipini lokugxilisa ukuze lubuyele endaweni efanayo.
Ngenxa yokukhishwa kwe-liquid egxilile, amandla amakhulu okugunda angakhiwa phezu kolwelwesi, ngaleyo ndlela anciphise ngempumelelo ukungcola kwe-membrane.Isilinganiso sesilinganiso sokugeleza koketshezi olugxilisiwe kuya kusilinganiso sokugeleza komkhiqizo oqediwe singalungiswa ngokuya ngesimo esithile soketshezi oluhlungiwe ukuze kuncishiswe ukungcoliswa kolwelwesi, futhi uketshezi olugxilile lungabuyela endaweni yalo yasekuqaleni futhi luphinde luphinde luphinde lube khona. -faka uhlelo lwe-ultrafiltration lokwelashwa kokuhlunga.
3 Uhlelo Lokuhlanza
Uhlelo lokuhlanza lwe-fiber engenalutho luyingxenye ebalulekile yesihlungi, ngoba ubuso be-membrane buzombozwa ukungcola okuhlukahlukene okuboshiwe, futhi ngisho nezimbobo ze-membrane zizovinjelwa ukungcola okuhle, okuzokwehlisa ukusebenza kokuhlukanisa, ngakho-ke okudingekayo ukugeza ulwelwesi ngesikhathi.
Isimiso sokuhlanza siwukuthi uketshezi lokuhlanza (amanzi ahlanzekile ngokuvamile ahlungiwe) lufakwa ngokuhlanekezelwa yiphampu yokuhlanza ngepayipi lungene kulwelwesi olungenalutho lwefiber filtration ukuze lugeze ukungcola odongeni lolwelwesi, futhi uketshezi olulahlwayo lukhishwa ngokukhishwa kwemfucuza. iphayiphi.Uhlelo lokuhlanza lwesihlungi lungahlanzwa ngezindlela ezinhle nezimbi.
Ukugeza okulungile (njengokushaywa kwengcindezi) indlela ethile ukuvala i-valve yokuphuma kwe-filtrate, vula i-valve yokuphuma kwamanzi, ipompo izoqala ukukhiqizwa kolwelwesi loketshezi lomzimba, lesi senzo senza i-fiber engenalutho ngaphakathi nangaphandle ingcindezi ezinhlangothini zombili iyalingana, umehluko wengcindezi adhesion in ukungcola okuxekethile ebusweni ulwelwesi, ukwandisa traffic aphinde ukugeza surface, ifilimu ethambile ebusweni inani elikhulu ukungcola ingasuswa.
I-Backwash (i-reverse flushing), indlela eqondile ukuvala i-valve yokuphuma kwe-filtrate, uvule ngokugcwele i-valve yokukhipha uketshezi lwemfucuza, uvule i-valve yokuhlanza, qala iphampu yokuhlanza, uketshezi lokuhlanza emzimbeni we-membrane, ukususa ukungcola emgodini wodonga lwe-membrane. .Lapho i-backwashing, ukunakekelwa kufanele kukhokhwe ekulawuleni ingcindezi yokuwasha, ingcindezi yokuwasha i-backwashing kufanele ibe ngaphansi kuka-0.2mpa, ngaphandle kwalokho kulula ukuphahlaza ifilimu noma ukucekela phansi i-bonding surface ye-fiber engenalutho kanye ne-binder futhi ifomu ukuvuza.
Nakuba ukuhlanza okuvamile nokuhlehlisayo kungagcina isivinini sokuhlunga kwe-membrane kahle, ngokunwetshwa kwesikhathi sokusebenza semojula ye-membrane, ukungcoliswa kwe-membrane kuzoba nzima nakakhulu, futhi ijubane lokuhlunga ulwelwesi nalo lizokwehla.Ukuze ubuyisele i-membrane filtration flux, imojula ye-membrane idinga ukuhlanzwa ngamakhemikhali.Ukuhlanza amakhemikhali kuvame ukwenziwa nge-asidi kuqala bese kuba yi-alkali.Ngokuvamile, u-2% we-citric acid usetshenziswa ekukhetheni, futhi u-1% ~ 2% we-NaOH usetshenziselwa ukuwasha nge-alkali.
Isikhathi sokuthumela: Aug-06-2021